diff --git a/.gitignore b/.gitignore
index 1f1befd..d5bebc6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1 @@
-/public
-/.hugo_build.lock
+/go-form
diff --git a/.woodpecker.yml b/.woodpecker.yml
deleted file mode 100644
index c04fa41..0000000
--- a/.woodpecker.yml
+++ /dev/null
@@ -1,32 +0,0 @@
-steps:
-  Build:
-    image: gitnet.fr/deblan/hugo
-    pull: true
-    environments:
-      HUGO_ENVIRONMENT: production
-    commands:
-      - hugo build
-
-  "Commit pages":
-    image: alpine/git
-    commands:
-      - mv public /tmp/
-      - git config --global user.email ci@gitnet.fr
-      - git config --global user.name CI
-      - git fetch --no-tags origin +refs/heads/pages
-      - git switch pages
-      - rm * -fr
-      - mv /tmp/public/* .
-      - git add .
-      - git commit -m "Build doc ${CI_BUILD_NUMBER}"
-
-  "Push pages":
-    image: appleboy/drone-git-push
-    commands:
-    settings:
-      branch: pages
-      remote: git@gitnet.fr:deblan/go-form.git
-      force: false
-      commit: false
-      ssh_key:
-        from_secret: ssh_priv_key
diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..ba56fe5
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,101 @@
+## [Unreleased]
+
+## v1.5.0
+
+### Added
+
+- feat: add collection widget
+- feat: refactoring and improvement of example
+
+## v1.4.0
+
+### Added
+
+- feat: add json configuration
+
+### Fixed
+
+- fix: reset `GlobalFields` in `End()`
+
+## v1.3.0
+
+### Added
+
+- feat: allow to handle request using json body"
+- feat: add `WithJsonRequest` on form
+- feat: add `MapToUrlValues` transformer
+
+## v1.2.0
+
+### Added
+
+- feat: add tag `field` to specify the naming strategy (case)
+- feat: add `ErrorsTree` methods on form and field
+
+## v1.1.6
+
+### Fixed
+
+- fix(input/choice): add specific validation func
+
+## v1.1.5
+
+### Fixed
+
+- fix(input/choice): add specific validation func
+
+## v1.1.4
+
+### Fixed
+
+- fix(theme/bootstrap5): fix button class
+- fix(theme/html5): remove div wrapper on form content
+
+## v1.1.3
+
+### Fixed
+
+- fix(form): replace existing option in WithOptions
+
+## v1.1.2
+
+### Added
+
+- chore(example): remove boostrap classes
+
+### Fixed
+
+- fix(theme): checkbox is check on nil value
+
+## v1.1.1
+
+### Fixed
+
+- feat(form): add default options
+- fix(choice): fix Match when field data is nil
+
+## v1.1.0
+
+### Added
+
+- feat: add go template functions to render a form, a field, etc.
+- feat: add constraints (isodd, iseven)
+- refactor: refactor constraint (not blank check)
+
+### Changed
+
+- feat: replace templates with gomponents
+
+## v1.0.1
+
+### Added
+
+- doc: add documentation
+
+## v1.0.0
+
+### Added
+
+- feat: form builder
+- feat: form validation
+- feat: form renderer
diff --git a/LICENCE b/LICENCE
new file mode 100644
index 0000000..be3f7b2
--- /dev/null
+++ b/LICENCE
@@ -0,0 +1,661 @@
+                    GNU AFFERO GENERAL PUBLIC LICENSE
+                       Version 3, 19 November 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
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+parties who would receive the covered work from you, a discriminatory
+patent license (a) in connection with copies of the covered work
+conveyed by you (or copies made from those copies), or (b) primarily
+for and in connection with specific products or compilations that
+contain the covered work, unless you entered into that arrangement,
+or that patent license was granted, prior to 28 March 2007.
+
+  Nothing in this License shall be construed as excluding or limiting
+any implied license or other defenses to infringement that may
+otherwise be available to you under applicable patent law.
+
+  12. No Surrender of Others' Freedom.
+
+  If conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License.  If you cannot convey a
+covered work so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you may
+not convey it at all.  For example, if you agree to terms that obligate you
+to collect a royalty for further conveying from those to whom you convey
+the Program, the only way you could satisfy both those terms and this
+License would be to refrain entirely from conveying the Program.
+
+  13. Remote Network Interaction; Use with the GNU General Public License.
+
+  Notwithstanding any other provision of this License, if you modify the
+Program, your modified version must prominently offer all users
+interacting with it remotely through a computer network (if your version
+supports such interaction) an opportunity to receive the Corresponding
+Source of your version by providing access to the Corresponding Source
+from a network server at no charge, through some standard or customary
+means of facilitating copying of software.  This Corresponding Source
+shall include the Corresponding Source for any work covered by version 3
+of the GNU General Public License that is incorporated pursuant to the
+following paragraph.
+
+  Notwithstanding any other provision of this License, you have
+permission to link or combine any covered work with a work licensed
+under version 3 of the GNU General Public License into a single
+combined work, and to convey the resulting work.  The terms of this
+License will continue to apply to the part which is the covered work,
+but the work with which it is combined will remain governed by version
+3 of the GNU General Public License.
+
+  14. Revised Versions of this License.
+
+  The Free Software Foundation may publish revised and/or new versions of
+the GNU Affero General Public License from time to time.  Such new versions
+will be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+  Each version is given a distinguishing version number.  If the
+Program specifies that a certain numbered version of the GNU Affero General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation.  If the Program does not specify a version number of the
+GNU Affero General Public License, you may choose any version ever published
+by the Free Software Foundation.
+
+  If the Program specifies that a proxy can decide which future
+versions of the GNU Affero General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+  Later license versions may give you additional or different
+permissions.  However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If your software can interact with users remotely through a computer
+network, you should also make sure that it provides a way for users to
+get its source.  For example, if your program is a web application, its
+interface could display a "Source" link that leads users to an archive
+of the code.  There are many ways you could offer source, and different
+solutions will be better for different programs; see section 13 for the
+specific requirements.
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU AGPL, see
+<https://www.gnu.org/licenses/>.
diff --git a/Makefile b/Makefile
deleted file mode 100644
index d8be964..0000000
--- a/Makefile
+++ /dev/null
@@ -1,7 +0,0 @@
-all: build
-
-serve:
-	hugo server --buildDrafts --disableFastRender
-
-build:
-	hugo build
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..3754083
--- /dev/null
+++ b/README.md
@@ -0,0 +1,20 @@
+# go-form
+
+Creating and processing HTML forms is hard and repetitive. You need to deal with rendering HTML form fields, validating submitted data, mapping the form data into objects and a lot more. [`go-form`][go-form] includes a powerful form feature that provides all these features.
+
+[`go-form`][go-form] is heavily influenced by [Symfony Form](https://symfony.com/doc/current/forms.html). It includes:
+
+* A form builder based on fields declarations and independent of structs
+* Validation based on constraints
+* Data mounting to populate a form from a struct instance
+* Data binding to populate a struct instance from a submitted form
+* Form renderer with customizable themes
+
+## Documentation
+
+* [Official documentation][doc]
+* [Demo][demo]
+
+[go-form]: https://gitnet.fr/deblan/go-form
+[demo]: https://gitnet.fr/deblan/go-form-demo
+[doc]: https://deblan.gitnet.page/go-form/
diff --git a/archetypes/default.md b/archetypes/default.md
deleted file mode 100644
index 0d5eebd..0000000
--- a/archetypes/default.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-date: '{{ .Date }}'
-draft: true
-title: '{{ replace .File.ContentBaseName "-" " " | title }}'
----
diff --git a/assets/css/custom.css b/assets/css/custom.css
deleted file mode 100644
index 202c701..0000000
--- a/assets/css/custom.css
+++ /dev/null
@@ -1,60 +0,0 @@
-.hidden {
-  display: none;
-}
-
-.hugo-goplay-summary {
-  cursor: pointer;
-}
-
-.hugo-goplay-textarea {
-  padding: 1rem;
-  width: 100%;
-  border-radius: 4px;
-  margin: 10px 0;
-  background-color: hsl(var(--primary-hue) var(--primary-saturation) calc(var(--primary-lightness) + calc(calc(100% - var(--primary-lightness)) / 50) * 27) / 0.1);
-  font-family: monospace;
-}
-
-.hugo-goplay-result pre {
-  padding: 1rem;
-}
-
-.hugo-goplay-result code {
-  background: none !important;
-  border: 0 !important;
-}
-
-.hugo-goplay-result .system {
-  color: green;
-}
-
-.hugo-goplay-result .stderr {
-  color: red;
-}
-
-.hugo-goplay-toolbox {
-  display: flex;
-  justify-content: flex-start;
-  margin-bottom: 2rem;
-}
-
-.hugo-goplay-toolbox .hugo-goplay-button {
-  font-size: 13px;
-  font-weight: bold;
-  border: 1px solid var(--primary);
-  padding: 0.15rem 0.75rem;
-  border-radius: 4px;
-  margin-left: 0.5rem;
-  color: var(--primary);
-  background-color: var(--theme);
-}
-
-.hugo-goplay-toolbox .hugo-goplay-button:hover {
-  border: 1px solid var(--theme);
-  color: var(--theme);
-  background-color: var(--primary);
-}
-
-.hugo-goplay-toolbox .hugo-goplay-button:first-child {
-  margin-left: 0;
-}
diff --git a/content/_index.md b/content/_index.md
deleted file mode 100644
index c96bcf4..0000000
--- a/content/_index.md
+++ /dev/null
@@ -1,58 +0,0 @@
----
-layout: hextra-home
-title: "Welcome!"
----
-
-{{< hextra/hero-badge >}}
-  <div class="hx:w-2 hx:h-2 hx:rounded-full hx:bg-primary-400"></div>
-  <span>Free, open source</span>
-  {{< icon name="arrow-circle-right" attributes="height=14" >}}
-{{< /hextra/hero-badge >}}
-
-<div class="hx:mt-6 hx:mb-6">
-{{< hextra/hero-headline >}}
-  Create and process forms with Golang!
-{{< /hextra/hero-headline >}}
-</div>
-
-<div class="hx:mb-12">
-{{< hextra/hero-subtitle >}}
-  Fast, batteries-included Hugo theme&nbsp;<br class="hx:sm:block hx:hidden" />for creating beautiful static websites
-{{< /hextra/hero-subtitle >}}
-<br class="hx:sm:block hx:hidden" />
-</div>
-
-<div class="hx:mb-6">
-{{< hextra/hero-button text="Get Started" link="docs" >}}
-<br class="hx:sm:block hx:hidden" />
-<br class="hx:sm:block hx:hidden" />
-</div>
-
-<div class="hx:mt-6"></div>
-
-{{< hextra/feature-grid >}}
-  {{< hextra/feature-card
-    title="Fast and Full-featured"
-    subtitle="Simple and easy to use, yet powerful and feature-rich."
-    class="hx:aspect-auto hx:md:aspect-[1.1/1] hx:max-md:min-h-[340px]"
-    image="images/hextra-doc.webp"
-    imageClass="hx:top-[40%] hx:left-[24px] hx:w-[180%] hx:sm:w-[110%] hx:dark:opacity-80"
-    style="background: radial-gradient(ellipse at 50% 80%,rgba(194,97,254,0.15),hsla(0,0%,100%,0));"
-  >}}
-  {{< hextra/feature-card
-    title="Form builder and validation"
-    subtitle="Compose with just Markdown. Enrich with Shortcode components."
-    class="hx:aspect-auto hx:md:aspect-[1.1/1] hx:max-lg:min-h-[340px]"
-    image="images/hextra-markdown.webp"
-    imageClass="hx:top-[40%] hx:left-[36px] hx:w-[180%] hx:sm:w-[110%] hx:dark:opacity-80"
-    style="background: radial-gradient(ellipse at 50% 80%,rgba(142,53,74,0.15),hsla(0,0%,100%,0));"
-  >}}
-  {{< hextra/feature-card
-    title="Mount and bind any struct"
-    subtitle="Built-in full text search with FlexSearch, no extra setup required."
-    class="hx:aspect-auto hx:md:aspect-[1.1/1] hx:max-md:min-h-[340px]"
-    image="images/hextra-search.webp"
-    imageClass="hx:top-[40%] hx:left-[36px] hx:w-[110%] hx:sm:w-[110%] hx:dark:opacity-80"
-    style="background: radial-gradient(ellipse at 50% 80%,rgba(221,210,59,0.15),hsla(0,0%,100%,0));"
-  >}}
-{{< /hextra/feature-grid >}}
diff --git a/content/docs/Installation.md b/content/docs/Installation.md
deleted file mode 100644
index cb641b4..0000000
--- a/content/docs/Installation.md
+++ /dev/null
@@ -1,9 +0,0 @@
----
-linkTitle: Installation
-title: Installation
-weight: 2
----
-
-```golang
-go get gitnet.fr/deblan/go-form
-```
diff --git a/content/docs/_index.md b/content/docs/_index.md
deleted file mode 100644
index 4a7b3d7..0000000
--- a/content/docs/_index.md
+++ /dev/null
@@ -1,14 +0,0 @@
----
-linkTitle: "Documentation"
-title: Introduction
----
-
-Creating and processing HTML forms is hard and repetitive. You need to deal with rendering HTML form fields, validating submitted data, mapping the form data into objects and a lot more. **go-form** includes a powerful form feature that provides all these features.
-
-**go-form** is heavily influenced by [Symfony Form](https://symfony.com/doc/current/forms.html). It includes:
-
-* A form builder based on fields declarations and independent of structs
-* Validation based on constraints
-* Data mounting to populate a form from a struct instance
-* Data binding to populate a struct instance from a submitted form
-* Form renderer with customizable themes
diff --git a/content/docs/constraints/_index.md b/content/docs/constraints/_index.md
deleted file mode 100644
index d874e08..0000000
--- a/content/docs/constraints/_index.md
+++ /dev/null
@@ -1,153 +0,0 @@
----
-linkTitle: Constraints
-title: Constraints
-weight: 5
----
-
-The validation is designed to validate data against constraints.
-
-## Import
-
-```golang
-import (
-	"gitnet.fr/deblan/go-form/validation"
-)
-```
-
-## Constraints
-
-### Length
-
-Validate the length of an array, a slice or a string
-
-```golang
-c := validation.NewLength()
-
-// Define minimum
-c.WithMin(1)
-
-// Define minimum
-c.WithMax(100)
-
-// Define min and max
-// Equivalent to c.WithMin(50).WithMax(50)
-c.WithExact(50)
-```
-
-### Mail
-
-```golang
-validation.NewMail()
-```
-
-### Not blank
-
-```golang
-validation.NewNotBlank()
-```
-
-### Range
-
-Validate a number
-
-```golang
-c := validation.NewRange()
-
-// Define minimum
-c.WithMin(1)
-
-// Define minimum
-c.WithMax(100)
-
-// Define min and max
-// Equivalent to c.WithMin(1).WithMax(100)
-c.WithRange(1, 100)
-```
-
-### Regex
-
-Validate a string with a regex
-
-```golang
-c := validation.NewRegex(`expression`)
-
-// The value must match
-c.MustMatch()
-
-// The value must not match
-c.MustNotMatch()
-```
-
-### Is even
-
-Validate that a number is even.
-
-```golang
-validation.NewIsEven()
-```
-
-### Is odd
-
-Validate that a number is odd.
-
-```golang
-validation.NewIsOdd()
-```
-
-
-## Custom constraint
-
-Use case: you want to validate that the data equals "example"
-
-```golang
-package validation
-
-import (
-	"reflect"
-
-	v "gitnet.fr/deblan/go-form/validation"
-)
-
-// Define a struct
-type IsExample struct {
-	Message          string
-	TypeErrorMessage string
-}
-
-// Create a factory
-func NewIsExample() IsEven {
-	return IsEven{
-		Message:          "This value does not equal \"example\".",
-		TypeErrorMessage: "This value can not be processed.",
-	}
-}
-
-// Implement the validation
-func (c IsExample) Validate(data any) []Error {
-	errors := []Error{}
-
-    // Should not validate blank data
-    if len(v.NewNotBlank().Validate(data)) != 0 {
-		return []Error{}
-	}
-
-	t := reflect.TypeOf(data)
-
-	if t.Kind() == reflect.Ptr {
-		t = t.Elem()
-	}
-
-	switch t.Kind() {
-	case reflect.String:
-		if data.(string) != "example" {
-    		errors = append(errors, Error(c.Message))
-        }
-
-	default:
-		errors = append(errors, Error(c.TypeErrorMessage))
-	}
-
-    return errors
-}
-```
-
diff --git a/content/docs/fields/_index.md b/content/docs/fields/_index.md
deleted file mode 100644
index 63fb9be..0000000
--- a/content/docs/fields/_index.md
+++ /dev/null
@@ -1,384 +0,0 @@
----
-linkTitle: Fields
-title: Fields
-weight: 4
----
-
-A field represents a field in a form.
-
-### Checkbox
-
-```golang
-func NewFieldCheckbox(name string) *Field
-```
-
-{{% goplay-field %}}
-<pre class="hidden">field := form.NewFieldCheckbox("Foo")</pre>
-{{% /goplay-field %}}
-
-Generates an input[type=checkbox]
-
-### Choice
-
-```golang
-func NewFieldChoice(name string) *Field
-```
-
-{{% goplay-field %}}
-<pre class="hidden">
-field := form.NewFieldChoice("Foo")
-</pre>
-{{% /goplay-field %}}
-
-
-Generates inputs (checkbox or radio) or selects
-
-### Csrf
-
-```golang
-func NewFieldCsrf(name string) *Field
-```
-
-{{% goplay-field %}}
-<pre class="hidden">
-field := form.NewFieldCsrf("Foo")
-</pre>
-{{% /goplay-field %}}
-
-### Date
-
-```golang
-func NewFieldDate(name string) *Field
-```
-
-{{% goplay-field %}}
-<pre class="hidden">
-field := form.NewFieldDate("Foo")
-</pre>
-{{% /goplay-field %}}
-
-Generates an input[type=date] with default transformers
-
-### Datetime
-
-```golang
-func NewFieldDatetime(name string) *Field
-```
-
-{{% goplay-field %}}
-<pre class="hidden">
-field := form.NewFieldDatetime("Foo")
-</pre>
-{{% /goplay-field %}}
-
-Generates an input[type=datetime] with default transformers
-
-### DatetimeLocal
-
-```golang
-func NewFieldDatetimeLocal(name string) *Field
-```
-
-{{% goplay-field %}}
-<pre class="hidden">
-field := form.NewFieldDatetimeLocal("Foo")
-</pre>
-{{% /goplay-field %}}
-
-Generates an input[type=datetime-local] with default transformers
-
-### Hidden
-
-```golang
-func NewFieldHidden(name string) *Field
-```
-
-{{% goplay-field %}}
-<pre class="hidden">
-field := form.NewFieldHidden("Foo")
-</pre>
-{{% /goplay-field %}}
-
-Generates an input[type=hidden]
-
-### Mail
-
-```golang
-func NewFieldMail(name string) *Field
-```
-
-{{% goplay-field %}}
-<pre class="hidden">
-field := form.NewFieldMail("Foo")
-</pre>
-{{% /goplay-field %}}
-
-Generates an input[type=email]
-
-### Number
-
-```golang
-func NewFieldNumber(name string) *Field
-```
-
-{{% goplay-field %}}
-<pre class="hidden">
-field := form.NewFieldNumber("Foo")
-</pre>
-{{% /goplay-field %}}
-
-Generates an input[type=number] with default transformers
-
-### Password
-
-```golang
-func NewFieldPassword(name string) *Field
-```
-
-{{% goplay-field %}}
-<pre class="hidden">
-field := form.NewFieldPassword("Foo")
-</pre>
-{{% /goplay-field %}}
-
-Generates an input[type=password]
-
-### Range
-
-```golang
-func NewFieldRange(name string) *Field
-```
-
-{{% goplay-field %}}
-<pre class="hidden">
-field := form.NewFieldRange("Foo")
-</pre>
-{{% /goplay-field %}}
-
-Generates an input[type=range]
-
-### Sub Form
-
-```golang
-func NewFieldSubForm(name string) *Field
-```
-
-{{% goplay-field %}}
-<pre class="hidden">
-field := form.NewFieldSubForm("Foo")
-</pre>
-{{% /goplay-field %}}
-
-Alias:
-
-```golang
-func NewSubForm(name string) *Field
-```
-
-Generates a sub form
-
-### Text
-
-```golang
-func NewFieldText(name string) *Field
-```
-
-{{% goplay-field %}}
-<pre class="hidden">
-field := form.NewFieldText("Foo")
-</pre>
-{{% /goplay-field %}}
-
-Generates an input[type=text]
-
-### Textarea
-
-```golang
-func NewFieldTextarea(name string) *Field
-```
-
-{{% goplay-field %}}
-<pre class="hidden">
-field := form.NewFieldTextarea("Foo")
-</pre>
-{{% /goplay-field %}}
-
-Generates a textarea
-
-### Time
-
-```golang
-func NewFieldTime(name string) *Field
-```
-
-{{% goplay-field %}}
-<pre class="hidden">
-field := form.NewFieldTime("Foo")
-</pre>
-{{% /goplay-field %}}
-
-Generates an input[type=time] with default transformers
-
-### Submit
-
-```golang
-func NewSubmit(name string) *Field
-```
-
-{{% goplay-field %}}
-<pre class="hidden">
-field := form.NewSubmit("Foo")
-</pre>
-{{% /goplay-field %}}
-
-Generates an input[type=submit]
-
-## Methods
-
-### Add
-
-```golang
-func (f *Field) Add(children ...*Field) *Field
-```
-
-Appends children
-
-### Bind
-
-```golang
-func (f *Field) Bind(data map[string]any, key *string) error
-```
-
-Bind the data into the given map
-
-### GetChild
-
-```golang
-func (f *Field) GetChild(name string) *Field
-```
-
-Returns a child using its name
-
-### GetId
-
-```golang
-func (f *Field) GetId() string
-```
-
-Computes the id of the field
-
-### GetName
-
-```golang
-func (f *Field) GetName() string
-```
-
-Computes the name of the field
-
-### GetOption
-
-```golang
-func (f *Field) GetOption(name string) *Option
-```
-
-Returns an option using its name
-
-### HasChild
-
-```golang
-func (f *Field) HasChild(name string) bool
-```
-
-Checks if the field contains a child using its name
-
-### HasOption
-
-```golang
-func (f *Field) HasOption(name string) bool
-```
-
-Checks if the field contains an option using its name
-
-### Mount
-
-```golang
-func (f *Field) Mount(data any) error
-```
-
-Populates the field with data
-
-### ResetErrors
-
-```golang
-func (f *Field) ResetErrors() *Field
-```
-
-Resets the field errors
-
-### WithBeforeBind
-
-```golang
-func (f *Field) WithBeforeBind(callback func(data any) (any, error)) *Field
-```
-
-Sets a transformer applied to the data of a field before defining it in a structure
-
-### WithBeforeMount
-
-```golang
-func (f *Field) WithBeforeMount(callback func(data any) (any, error)) *Field
-```
-
-Sets a transformer applied to the structure data before displaying it in a field
-
-### WithConstraints
-
-```golang
-func (f *Field) WithConstraints(constraints ...validation.Constraint) *Field
-```
-
-Appends constraints
-
-### WithData
-
-```golang
-func (f *Field) WithData(data any) *Field
-```
-
-Sets data the field
-
-### WithFixedName
-
-```golang
-func (f *Field) WithFixedName() *Field
-```
-
-Sets that the name of the field is not computed
-
-### WithOptions
-
-```golang
-func (f *Field) WithOptions(options ...*Option) *Field
-```
-
-#### Common options
-
-| Name         | type         | description                                           | Info                          |
-| ----         | ----         | ----                                                  | ----                          |
-| `required`   | `bool`       | Add `required="true"`                                 | Does not apply a constraint   |
-| `attr`       | `form.Attrs` | List of extra attributes of the field                 |                               |
-| `row_attr`   | `form.Attrs` | List of extra attributes of the field's top container |                               |
-| `label`      | `string`     | The label of the field                                | Usually show before the field |
-| `label_attr` | `form.Attrs` | List of extra attributes of the label                 |                               |
-| `help`       | `string`     | Helper of the field                                   |                               |
-| `help_attr`  | `form.Attrs` | List of extra attributes of the help                  |                               |
-
-Appends options to the field
-
-### WithSlice
-
-```golang
-func (f *Field) WithSlice() *Field
-```
-
-Sets that the field represents a data slice
diff --git a/content/docs/form/_index.md b/content/docs/form/_index.md
deleted file mode 100644
index 60466be..0000000
--- a/content/docs/form/_index.md
+++ /dev/null
@@ -1,243 +0,0 @@
----
-linkTitle: Form
-title: Form
-weight: 3
----
-
-## Example
-
-### Prerequisites
-
-```golang
-import (
-	"gitnet.fr/deblan/go-form/form"
-	"gitnet.fr/deblan/go-form/validation"
-)
-
-type Person struct {
-    Name string
-    Age  int
-}
-```
-
-### Creating a form
-
-```golang
-myForm := form.NewForm(
-    form.NewFieldText("Name").
-        WithConstraints(
-            validation.NewNotBlank(),
-        ),
-    form.NewFieldNumber("Age").
-        WithConstraints(
-            validation.NewNotBlank(),
-            validation.NewRange().WithMin(18),
-        ),
-).End()
-```
-
-### Validating a struct
-
-```golang
-data := Person{}
-
-myForm.Mount(data)
-myForm.IsValid() // false
-
-data = Person{
-    Name: "Alice",
-    Age:  42,
-}
-
-myForm.Mount(data)
-myForm.IsValid() // true
-```
-
-### Validating a request
-
-```golang
-import (
-    "net/http"
-)
-
-myForm.WithMethod(http.MethodPost)
-
-// req *http.Request
-if req.Method == myForm.Method {
-    myForm.HandleRequest(req)
-
-    if myForm.IsSubmitted() && myForm.IsValid() {
-        myForm.Bind(&data)
-    }
-}
-```
-
-## Struct
-
-```golang
-type Form struct {
-	Fields       []*Field
-	GlobalFields []*Field
-	Errors       []validation.Error
-	Method       string
-	Action       string
-	Name         string
-	Options      []*Option
-	RequestData  *url.Values
-}
-```
-
-## Methods
-
-### NewForm
-
-```golang
-func NewForm(fields ...*Field) *Form
-```
-
-Generates a new form with default properties
-
-### Add
-
-```golang
-func (f *Form) Add(fields ...*Field)
-```
-
-Appends children
-
-### AddGlobalField
-
-```golang
-func (f *Form) AddGlobalField(field *Field)
-```
-
-Configures its children deeply
-
-### Bind
-
-```golang
-func (f *Form) Bind(data any) error
-```
-
-Copies datas from the form to a struct
-
-### End
-
-```golang
-func (f *Form) End() *Form
-```
-
-Configures its children deeply This function must be called after adding all
-
-fields
-
-### GetField
-
-```golang
-func (f *Form) GetField(name string) *Field
-```
-
-Returns a child using its name
-
-### GetOption
-
-```golang
-func (f *Form) GetOption(name string) *Option
-```
-
-Returns an option using its name
-
-### HandleRequest
-
-```golang
-func (f *Form) HandleRequest(req *http.Request)
-```
-
-Processes a request
-
-### HasField
-
-```golang
-func (f *Form) HasField(name string) bool
-```
-
-Checks if the form contains a child using its name
-
-### HasOption
-
-```golang
-func (f *Form) HasOption(name string) bool
-```
-
-Checks if the form contains an option using its name
-
-### IsSubmitted
-
-```golang
-func (f *Form) IsSubmitted() bool
-```
-
-Checks if the form is submitted
-
-### IsValid
-
-```golang
-func (f *Form) IsValid() bool
-```
-
-Checks the a form is valid
-
-### Mount
-
-```golang
-func (f *Form) Mount(data any) error
-```
-
-Copies datas from a struct to the form
-
-### ResetErrors
-
-```golang
-func (f *Form) ResetErrors() *Form
-```
-
-Resets the form errors
-
-### WithAction
-
-```golang
-func (f *Form) WithAction(v string) *Form
-```
-
-Sets the action of the form (eg: "/")
-
-### WithMethod
-
-```golang
-func (f *Form) WithMethod(v string) *Form
-```
-
-Sets the method of the format (http.MethodPost, http.MethodGet, ...)
-
-### WithName
-
-```golang
-func (f *Form) WithName(v string) *Form
-```
-
-Sets the name of the form (used to compute name of fields)
-
-### WithOptions
-
-```golang
-func (f *Form) WithOptions(options ...*Option) *Form
-```
-
-Appends options to the form
-
-#### Options
-
- | Name   | Type                | Description              |
- | ----   | ----                | ----                     |
- | `attr` | `map[string]string` | List of extra attributes |
- | `help` | `string`            | Helper                   |
diff --git a/content/docs/rendering/_index.md b/content/docs/rendering/_index.md
deleted file mode 100644
index 4bc00d3..0000000
--- a/content/docs/rendering/_index.md
+++ /dev/null
@@ -1,67 +0,0 @@
----
-linkTitle: Rendering
-title: Rendering
-weight: 6
----
-
-**go-form** allows you to render a form using Go's built-in template engine.
-Here is a simple example that displays a form:
-
-```golang
-myForm := form.NewForm(...)
-
-render := theme.NewRenderer(theme.Bootstrap5)
-
-tpl, _ := template.New("page").Funcs(render.FuncMap()).Parse(`
-    <html>
-        <head>
-            <title>My form</title>
-        </head>
-        <body>
-            {{ form .Form }}
-        </body>
-    </html>
-`)
-
-b := new(strings.Builder)
-
-tpl.Execute(w, map[string]any{
-    "Form": myForm,
-})
-
-fmt.Println(b.String())
-```
-
-{{% goplay-auto-import-main %}}
-<pre class="hidden">
-@import "fmt"
-@import "html/template"
-@import "strings"
-@import
-@import "github.com/yosssi/gohtml"
-@import "gitnet.fr/deblan/go-form/example"
-@import "gitnet.fr/deblan/go-form/theme"
-
-form := example.CreateDataForm()
-render := theme.NewRenderer(theme.Html5)
-// render := theme.NewRenderer(theme.Bootstrap5)
-
-tpl, _ := template.New("page").Funcs(render.FuncMap()).Parse(`{{ form .Form }}`)
-
-buff := new(strings.Builder)
-
-tpl.Execute(buff, map[string]any{
-    "Form": form,
-})
-
-fmt.Println(gohtml.Format(buff.String()))
-</pre>
-{{% /goplay-auto-import-main %}}
-
-Other helper functions are available to render specific parts of the form:
-
-- `form_errors`: displays the form's global errors
-- `form_row` : renders the label, errors, and widget of a field
-- `form_label`: renders only the label of a field
-- `form_widget`: renders only the widget of a field
-- `form_widget_errors`: renders only the errors of a specific field
diff --git a/content/docs/rendering/theming.md b/content/docs/rendering/theming.md
deleted file mode 100644
index 252e940..0000000
--- a/content/docs/rendering/theming.md
+++ /dev/null
@@ -1,11 +0,0 @@
----
-linkTitle: Theming
-title: Theming
----
-
-**go-form** provides 2 themes:
-
-- `theme.Html5`: a basic view without classes
-- `theme.Bootstrap5`: a theme for [Bootstrap 5](https://getbootstrap.com/)
-
-You can add a custom theme. Learn by reading the [Bootstrap5](https://gitnet.fr/deblan/go-form/src/branch/main/theme/bootstrap5.go) theme.
diff --git a/content/docs/workflow/_index.md b/content/docs/workflow/_index.md
deleted file mode 100644
index 6f2b485..0000000
--- a/content/docs/workflow/_index.md
+++ /dev/null
@@ -1,120 +0,0 @@
----
-linkTitle: Workflow
-title: Workflow
-weight: 2
----
-
-{{% steps %}}
-
-### Import
-
-```golang
-import (
-    "html/template"
-	"net/http"
-
-    "gitnet.fr/deblan/go-form/form"
-    "gitnet.fr/deblan/go-form/theme"
-)
-```
-
-### Create a form
-
-```golang
-// Let's create a new form
-// You can pass *form.Field as arguments
-myForm := form.NewForm(field1, field2, ...)
-
-// Add somes fields
-myForm.Add(field3, field4, ...)
-
-// Set the method
-// <form method="POST" ...>
-myForm.WithMethod(http.MethodPost)
-
-// Define the action
-// <form action="/" ...>
-myForm.WithAction("/")
-
-// Set a name
-myForm.WithName("myForm")
-
-// Add options
-myForm.WithOptions(option1, option2, ...)
-
-// When all fields are added, call End()
-myForm.End()
-```
-
-#### Attributes
-
-Some options are natively supported in go-form themes.
-
-```golang
-myForm.WithOptions(
-    form.NewOption("help", "A help for the form"),
-    // <form data-foo="bar" data-bar="bar" ...
-    form.NewOption("attr", form.Attrs{
-        "data-foo": "foo",
-        "data-bar": "bar",
-    }),
-)
-```
-
-### Data mounting
-
-This step is not required when you does not want to pre-fill the form.
-Your struct can be complexe and the form only map existing properties.
-
-```golang
-type Person struct {
-    Name string
-    Age  int
-}
-
-data := Person{
-    Name: "Alice",
-    Age:  42,
-}
-
-// Assuming 2 fields named "Name" and "Age" exist
-myForm.Mount(data)
-```
-
-### Rendering
-
-```golang
-http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
-    // myForm := form.NewForm(...)
-
-    render := theme.NewRenderer(theme.Html5)
-    tpl, _ := template.New("page").Funcs(render.FuncMap()).Parse(`{{ form .Form }}`)
-
-    w.Header().Set("Content-Type", "text/html; charset=utf-8")
-
-    tpl.Execute(w, map[string]any{
-        "Form": myForm,
-    })
-}
-```
-
-### Data binding
-
-This is the final step. After the form handles the request, you can check if the form has been submitted, check the values are valid and finally populate your struct.
-
-```golang
-http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
-    // data := Person{...}
-    // myForm := form.NewForm(...)
-
-    if r.Method == myForm.Method {
-        myForm.HandleRequest(r)
-
-        if myForm.IsSubmitted() && myForm.IsValid() {
-            myForm.Bind(&data)
-        }
-    }
-})
-```
-
-{{% /steps %}}
diff --git a/doc.md b/doc.md
new file mode 100644
index 0000000..e08a3ab
--- /dev/null
+++ b/doc.md
@@ -0,0 +1 @@
+go doc -all -short form.Form | sed 's/^func \(.*\)$/### \0\n\n\`\`\`golang\n\0\n\`\`\`/g' | sed 's/^    \(.*\)/\n\1/g' | sed 's/^### func .* \(.*\)\((.*)\).*/### \1/' | xclip -sel c
diff --git a/example.go b/example.go
new file mode 100644
index 0000000..91918d4
--- /dev/null
+++ b/example.go
@@ -0,0 +1,81 @@
+package main
+
+import (
+	"embed"
+	"encoding/json"
+	"html/template"
+	"log"
+	"net/http"
+
+	"github.com/yassinebenaid/godump"
+	"gitnet.fr/deblan/go-form/example"
+	"gitnet.fr/deblan/go-form/theme"
+)
+
+//go:embed example/view/*.html
+var templates embed.FS
+
+func handler(view, action string, formRenderer *theme.Renderer, w http.ResponseWriter, r *http.Request) {
+	entity := example.ExampleData{}
+	entityForm := example.CreateDataForm(action)
+	entityForm.Mount(entity)
+
+	style := example.NewTheme(action)
+	styleForm := example.CreateThemeSelectorForm()
+	styleForm.Mount(style)
+
+	if r.Method == entityForm.Method {
+		entityForm.HandleRequest(r)
+
+		if entityForm.IsSubmitted() && entityForm.IsValid() {
+			entityForm.Bind(&entity)
+		}
+	}
+
+	content, _ := templates.ReadFile(view)
+
+	formAsJson, _ := json.MarshalIndent(entityForm, "  ", "  ")
+
+	tpl, _ := template.New("page").
+		Funcs(formRenderer.FuncMap()).
+		Parse(string(content))
+
+	w.Header().Set("Content-Type", "text/html; charset=utf-8")
+
+	var dump godump.Dumper
+	dump.Theme = godump.Theme{}
+
+	tpl.Execute(w, map[string]any{
+		"isSubmitted": entityForm.IsSubmitted(),
+		"isValid":     entityForm.IsValid(),
+		"form":        entityForm,
+		"styleForm":   styleForm,
+		"json":        string(formAsJson),
+		"dump":        template.HTML(dump.Sprint(entity)),
+	})
+}
+
+func main() {
+	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+		handler(
+			"example/view/html5.html",
+			"/",
+			theme.NewRenderer(theme.Html5),
+			w,
+			r,
+		)
+	})
+
+	http.HandleFunc("/bootstrap", func(w http.ResponseWriter, r *http.Request) {
+		handler(
+			"example/view/bootstrap.html",
+			"/bootstrap",
+			theme.NewRenderer(theme.Bootstrap5),
+			w,
+			r,
+		)
+	})
+
+	log.Println("Browse: http://localhost:1122")
+	log.Fatal(http.ListenAndServe(":1122", nil))
+}
diff --git a/example/form.go b/example/form.go
new file mode 100644
index 0000000..fc6e8bf
--- /dev/null
+++ b/example/form.go
@@ -0,0 +1,251 @@
+package example
+
+import (
+	"net/http"
+	"time"
+
+	"github.com/spf13/cast"
+	"gitnet.fr/deblan/go-form/form"
+	"gitnet.fr/deblan/go-form/validation"
+)
+
+type Item struct {
+	Id   uint
+	Name string
+}
+
+type ExampleOtherInputs struct {
+	Number   float32
+	Range    uint
+	Mail     string
+	Password string
+}
+
+type ExampleChoices struct {
+	Select                 *Item
+	SelectExpanded         *Item
+	MultipleSelect         []Item
+	MultipleSelectExpanded []Item
+}
+
+type ExampleDates struct {
+	Date          *time.Time
+	DateTime      *time.Time
+	DateTimeLocal *time.Time
+	Time          *time.Time
+}
+
+type ExampleData struct {
+	Collection []CollectionItem
+	Bytes      []byte
+	Text       string
+	Checkbox   bool
+	Dates      ExampleDates
+	Choices    ExampleChoices
+	Inputs     ExampleOtherInputs
+}
+
+type CollectionItem struct {
+	ValueA string
+	ValueB string
+}
+
+type Theme struct {
+	Value string `field:"lowerCamel"`
+}
+
+func CreateDataForm(action string) *form.Form {
+	items := []Item{
+		Item{Id: 1, Name: "Item 1"},
+		Item{Id: 2, Name: "Item 2"},
+		Item{Id: 3, Name: "Item 3"},
+	}
+
+	itemsChoices := form.NewChoices(items).
+		WithValueBuilder(func(key int, item any) string {
+			return cast.ToString(item.(Item).Id)
+		}).
+		WithLabelBuilder(func(key int, item any) string {
+			return item.(Item).Name
+		})
+
+	return form.NewForm(
+		form.NewFieldText("Bytes").
+			WithOptions(
+				form.NewOption("label", "Bytes"),
+				form.NewOption("required", true),
+			).
+			WithBeforeMount(func(data any) (any, error) {
+				return cast.ToString(data), nil
+			}).
+			WithBeforeBind(func(data any) (any, error) {
+				return []byte(cast.ToString(data)), nil
+			}).
+			WithConstraints(
+				validation.NewNotBlank(),
+			),
+		form.NewFieldTextarea("Text").
+			WithOptions(
+				form.NewOption("label", "Text"),
+				form.NewOption("help", "Must contain 'deblan'"),
+			).
+			WithConstraints(
+				validation.NewRegex(`deblan`),
+			),
+		form.NewFieldCheckbox("Checkbox").
+			WithOptions(
+				form.NewOption("label", "Checkbox"),
+			),
+		form.NewSubForm("Inputs").
+			WithOptions(
+				form.NewOption("label", "Inputs"),
+			).
+			Add(
+				form.NewFieldNumber("Number").
+					WithOptions(
+						form.NewOption("label", "Number"),
+					).
+					WithConstraints(
+						validation.NewRange().WithRange(1, 20),
+						validation.NewIsEven(),
+					),
+				form.NewFieldRange("Range").
+					WithOptions(
+						form.NewOption("label", "Range"),
+					),
+				form.NewFieldMail("Mail").
+					WithOptions(
+						form.NewOption("label", "Mail"),
+					).
+					WithConstraints(
+						validation.Mail{},
+					),
+				form.NewFieldPassword("Password").
+					WithOptions(
+						form.NewOption("label", "Password"),
+					).
+					WithConstraints(
+						validation.NewLength().WithMin(10),
+					),
+			),
+		form.NewSubForm("Dates").
+			WithOptions(
+				form.NewOption("label", "Dates"),
+			).
+			Add(
+				form.NewFieldDate("Date").
+					WithOptions(
+						form.NewOption("label", "Date"),
+					),
+				form.NewFieldDatetime("DateTime").
+					WithOptions(
+						form.NewOption("label", "Datetime"),
+					),
+				form.NewFieldDatetimeLocal("DateTimeLocal").
+					WithOptions(
+						form.NewOption("label", "DateTime local"),
+					),
+				form.NewFieldTime("Time").
+					WithOptions(
+						form.NewOption("label", "Time"),
+					),
+			),
+		form.NewSubForm("Choices").
+			WithOptions(form.NewOption("label", "Choices")).
+			Add(
+				form.NewFieldChoice("Select").
+					WithOptions(
+						form.NewOption("choices", itemsChoices),
+						form.NewOption("label", "Select"),
+					).
+					WithConstraints(
+						validation.NewNotBlank(),
+					),
+				form.NewFieldChoice("SelectExpanded").
+					WithOptions(
+						form.NewOption("choices", itemsChoices),
+						form.NewOption("label", "Select (expanded)"),
+						form.NewOption("expanded", true),
+					),
+				form.NewFieldChoice("MultipleSelect").
+					WithSlice().
+					WithOptions(
+						form.NewOption("choices", itemsChoices),
+						form.NewOption("label", "Multiple select"),
+						form.NewOption("multiple", true),
+					).
+					WithConstraints(
+						validation.NewNotBlank(),
+						validation.NewLength().WithExact(2),
+					),
+				form.NewFieldChoice("MultipleSelectExpanded").
+					WithSlice().
+					WithOptions(
+						form.NewOption("choices", itemsChoices),
+						form.NewOption("label", "Multiple select (expanded)"),
+						form.NewOption("expanded", true),
+						form.NewOption("multiple", true),
+					),
+			),
+		form.NewFieldCollection("Collection").
+			WithOptions(
+				form.NewOption("label", "Collection"),
+				form.NewOption("form", form.NewForm(
+					form.NewFieldText("ValueA").
+						WithOptions(form.NewOption("label", "Value A")).
+						WithConstraints(
+							validation.NewNotBlank(),
+						),
+					form.NewFieldText("ValueB").
+						WithOptions(form.NewOption("label", "Value B")),
+				)),
+			),
+		form.NewFieldCsrf("_csrf_token").WithData("my-token"),
+		form.NewSubmit("submit").
+			WithOptions(
+				form.NewOption("attr", form.Attrs{
+					"class": "btn btn-primary",
+				}),
+			),
+	).
+		End().
+		WithOptions(
+			form.NewOption("help", "Form global help"),
+		).
+		WithMethod(http.MethodPost).
+		WithAction(action)
+}
+
+func NewTheme(value string) *Theme {
+	return &Theme{Value: value}
+}
+
+func CreateThemeSelectorForm() *form.Form {
+	choices := form.NewChoices([]map[string]string{
+		map[string]string{"value": "/", "label": "Html5"},
+		map[string]string{"value": "/bootstrap", "label": "Bootstrap5"},
+	})
+
+	choices.LabelBuilder = func(key int, item any) string {
+		return item.(map[string]string)["label"]
+	}
+
+	choices.ValueBuilder = func(key int, item any) string {
+		return item.(map[string]string)["value"]
+	}
+
+	return form.NewForm(
+		form.NewFieldChoice("value").
+			WithOptions(
+				form.NewOption("choices", choices),
+				form.NewOption("label", "Select a theme"),
+				form.NewOption("required", true),
+				form.NewOption("attr", form.Attrs{
+					"onchange": "document.location.href = this.value",
+				}),
+			),
+	).
+		End().
+		WithName("").
+		WithMethod(http.MethodGet)
+}
diff --git a/example/view/bootstrap.html b/example/view/bootstrap.html
new file mode 100644
index 0000000..23543fd
--- /dev/null
+++ b/example/view/bootstrap.html
@@ -0,0 +1,119 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+	<meta charset="UTF-8">
+	<title>Demo of go-form with Bootstrap</title>
+	<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.7/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-LN+7fdVzj6u52u30Kp6M/trliBMCMKTyK833zpbD+pXdCLuTusPj697FH4R/5mcr" crossorigin="anonymous">
+    	<style>
+        fieldset {
+            border-radius: var(--bs-border-radius);
+            border: var(--bs-border-width) solid var(--bs-border-color);
+            padding: 10px;
+        }
+
+        form > div:not(:last-child), fieldset > div:not(:last-child) {
+            padding-bottom: 20px;
+        }
+
+        .gf-help {
+            font-style: italic;
+            color: #999;
+        }
+	</style>
+</head>
+<body>
+	<div class="container pt-2">
+        {{ form_widget (.styleForm.GetField "value") }}
+        <hr>
+
+        <h1>Demo of go-form with Bootstrap</h1>
+
+        <details>
+            <summary>Debug view</summary>
+            <div class="py-2">
+                <strong>Submitted:</strong>
+                {{ .isSubmitted }}
+            </div>
+            <div class="py-2">
+                <strong>Valid:</strong>
+                {{ .isValid }}
+            </div>
+
+            <details class="py-2">
+                <summary><strong>Dump of data</strong></summary>
+                <pre class="p-2">{{ .dump }}</pre>
+            </details>
+
+            <details class="py-2">
+                <summary><strong>Form as JSON</strong></summary>
+                <pre class="p-2">{{ .json }}</pre>
+            </details>
+        </details>
+
+        {{if .isValid}}
+            <div class="alert alert-success">The form is valid!</div>
+        {{else}}
+            <div class="alert alert-warning">The form is invalid!</div>
+        {{end}}
+
+		{{ form .form }}
+	</div>
+
+	<script>
+		const collections = document.querySelectorAll('*[data-prototype]')
+
+        const collectionItemAddToolBar = (item) => {
+			const toolbar = document.createElement('div')
+
+			const createBtn = () => {
+				const btn = document.createElement('button')
+				btn.textContent = '-'
+				btn.type = 'button'
+                btn.className = "btn btn-primary"
+
+				btn.addEventListener('click', () => {
+				    item.remove()
+                })
+
+				return btn
+			}
+
+			toolbar.appendChild(createBtn())
+			item.querySelector('fieldset').appendChild(toolbar)
+        }
+
+        const collectionAddToolbar = (collection) => {
+			const container = collection.parentNode
+			const toolbar = document.createElement('div')
+
+			const createBtn = () => {
+				const btn = document.createElement('button')
+				btn.textContent = '+'
+				btn.type = 'button'
+                btn.className = "btn btn-primary"
+
+				btn.addEventListener('click', () => {
+					const form = collection.getAttribute('data-prototype')
+						.replace(/__name__/g, collection.children.length)
+
+					collection.insertAdjacentHTML("beforeend", form)
+                    collectionItemAddToolBar(collection.lastChild)
+				})
+
+				return btn
+			}
+
+			toolbar.appendChild(createBtn())
+			container.appendChild(toolbar)
+        }
+
+		collections.forEach((collection) => {
+            collectionAddToolbar(collection)
+
+            for (let item of collection.children) {
+                collectionItemAddToolBar(item)
+            }
+        })
+	</script>
+</body>
+</html>
diff --git a/example/view/html5.html b/example/view/html5.html
new file mode 100644
index 0000000..88db2d8
--- /dev/null
+++ b/example/view/html5.html
@@ -0,0 +1,138 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+	<meta charset="UTF-8">
+	<title>Demo of go-form (pure HTML5 and Pico)</title>
+    <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/@picocss/pico@2/css/pico.min.css">
+    <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/@picocss/pico@2/css/pico.colors.min.css">
+    <meta name="viewport" content="width=device-width, initial-scale=1">
+    <meta name="color-scheme" content="light">
+
+	<style>
+        * {
+            font-size: 15px;
+        }
+
+        .p10 {
+            padding-top: 10px;
+            padding-bottom: 10px;
+        }
+
+        pre {
+            padding: 10px;
+        }
+
+        fieldset {
+            border: 1px solid var(--pico-form-element-border-color);
+            padding: 10px;
+        }
+
+        form > div:not(:last-child), fieldset > div:not(:last-child) {
+            padding-bottom: 20px;
+        }
+
+        .gf-errors {
+            color: var(--pico-form-element-invalid-border-color);
+        }
+
+        .gf-help {
+            font-style: italic;
+            color: var(--pico-form-element-placeholder-color);
+        }
+	</style>
+</head>
+<body class="container p10">
+    {{ form_widget (.styleForm.GetField "value") }}
+    <hr>
+
+    <h1>Demo of go-form (pure HTML5 and Pico)</h1>
+
+    <details class="p10">
+        <summary>Debug view</summary>
+
+            <div class="p10">
+                <strong>Submitted:</strong>
+                {{ .isSubmitted }}
+            </div>
+            <div class="p10">
+                <strong>Valid:</strong>
+                {{ .isValid }}
+            </div>
+
+            <details class="p10">
+                <summary><strong>Dump of data</strong></summary>
+                <pre>{{ .dump }}</pre>
+            </details>
+
+            <details class="p10">
+                <summary><strong>Form as JSON</strong></summary>
+                <pre>{{ .json }}</pre>
+            </details>
+        </div>
+    </details>
+
+    {{if .isValid}}
+        <p class="pico-color-green-500">The form is valid!</p>
+    {{else}}
+        <p class="pico-color-red-500">The form is invalid!</p>
+    {{end}}
+
+    {{ form .form }}
+
+	<script>
+		const collections = document.querySelectorAll('*[data-prototype]')
+
+        const collectionItemAddToolBar = (item) => {
+			const toolbar = document.createElement('div')
+
+			const createBtn = () => {
+				const btn = document.createElement('button')
+				btn.textContent = '-'
+				btn.type = 'button'
+
+				btn.addEventListener('click', () => {
+				    item.remove()
+                })
+
+				return btn
+			}
+
+			toolbar.appendChild(createBtn())
+			item.querySelector('fieldset').appendChild(toolbar)
+        }
+
+        const collectionAddToolbar = (collection) => {
+			const container = collection.parentNode
+			const toolbar = document.createElement('div')
+
+			const createBtn = () => {
+				const btn = document.createElement('button')
+				btn.textContent = '+'
+				btn.type = 'button'
+
+				btn.addEventListener('click', () => {
+					const form = collection.getAttribute('data-prototype')
+						.replace(/__name__/g, collection.children.length)
+
+					collection.insertAdjacentHTML("beforeend", form)
+                    collectionItemAddToolBar(collection.lastChild)
+				})
+
+				return btn
+			}
+
+			toolbar.appendChild(createBtn())
+			container.appendChild(toolbar)
+        }
+
+		collections.forEach((collection) => {
+            collectionAddToolbar(collection)
+
+            for (let item of collection.children) {
+                collectionItemAddToolBar(item)
+            }
+        })
+	</script>
+</body>
+</html>
+
diff --git a/form/field.go b/form/field.go
new file mode 100644
index 0000000..fe63326
--- /dev/null
+++ b/form/field.go
@@ -0,0 +1,423 @@
+package form
+
+// @license GNU AGPL version 3 or any later version
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+import (
+	"fmt"
+	"maps"
+	"slices"
+	"strings"
+
+	"gitnet.fr/deblan/go-form/util"
+	"gitnet.fr/deblan/go-form/validation"
+)
+
+// Generic function for field.Validation
+func DefaultFieldValidation(f *Field) bool {
+	if len(f.Children) > 0 {
+		isValid := true
+
+		for _, c := range f.Children {
+			c.ResetErrors()
+			isChildValid, errs := validation.Validate(c.Data, c.Constraints)
+
+			if len(errs) > 0 {
+				c.Errors = errs
+			}
+
+			isValid = isChildValid && isValid
+
+			for _, sc := range c.Children {
+				isValid = DefaultFieldValidation(sc) && isValid
+			}
+		}
+
+		return isValid
+	} else {
+		f.ResetErrors()
+		isValid, errs := validation.Validate(f.Data, f.Constraints)
+
+		if len(errs) > 0 {
+			f.Errors = errs
+		}
+
+		return isValid
+	}
+}
+
+// Field represents a field in a form
+type Field struct {
+	Name         string                      `json:"name"`
+	NamePrefix   string                      `json:"name_prefix"`
+	Widget       string                      `json:"widget"`
+	Data         any                         `json:"-"`
+	Options      []*Option                   `json:"options"`
+	Children     []*Field                    `json:"children"`
+	Constraints  []validation.Constraint     `json:"-"`
+	Errors       []validation.Error          `json:"-"`
+	BeforeMount  func(data any) (any, error) `json:"-"`
+	BeforeBind   func(data any) (any, error) `json:"-"`
+	Validate     func(f *Field) bool         `json:"-"`
+	IsSlice      bool                        `json:"is_slice"`
+	IsCollection bool                        `json:"is_collection"`
+	IsFixedName  bool                        `json:"is_fixed_name"`
+	Form         *Form                       `json:"-"`
+	Parent       *Field                      `json:"-"`
+}
+
+// Generates a new field with default properties
+// It should not be used directly but inside function like in form.NewFieldText
+func NewField(name, widget string) *Field {
+	f := &Field{
+		Name:        name,
+		IsFixedName: false,
+		Widget:      widget,
+		Data:        nil,
+	}
+
+	f.BeforeMount = func(data any) (any, error) {
+		return data, nil
+	}
+
+	f.BeforeBind = func(data any) (any, error) {
+		return data, nil
+	}
+
+	f.WithOptions(
+		NewOption("attr", Attrs{}),
+		NewOption("row_attr", Attrs{}),
+		NewOption("label_attr", Attrs{}),
+		NewOption("help_attr", Attrs{}),
+	)
+
+	f.Validate = DefaultFieldValidation
+
+	return f
+}
+
+func (f *Field) Copy() *Field {
+	return &Field{
+		Name:        f.Name,
+		Form:        f.Form,
+		Widget:      f.Widget,
+		Options:     f.Options,
+		Constraints: f.Constraints,
+		BeforeMount: f.BeforeMount,
+		BeforeBind:  f.BeforeBind,
+		Validate:    f.Validate,
+		IsSlice:     f.IsSlice,
+		IsFixedName: f.IsFixedName,
+	}
+}
+
+// Checks if the field contains an option using its name
+func (f *Field) HasOption(name string) bool {
+	for _, option := range f.Options {
+		if option.Name == name {
+			return true
+		}
+	}
+
+	return false
+}
+
+// Returns an option using its name
+func (f *Field) GetOption(name string) *Option {
+	for _, option := range f.Options {
+		if option.Name == name {
+			return option
+		}
+	}
+
+	return nil
+}
+
+// Appends options to the field
+func (f *Field) WithOptions(options ...*Option) *Field {
+	for _, option := range options {
+		if f.HasOption(option.Name) {
+			f.GetOption(option.Name).Value = option.Value
+		} else {
+			f.Options = append(f.Options, option)
+		}
+	}
+
+	return f
+}
+
+// Remove an option if exists
+func (f *Field) RemoveOption(name string) *Field {
+	var options []*Option
+
+	for _, option := range f.Options {
+		if option.Name != name {
+			options = append(options, option)
+		}
+	}
+
+	f.Options = options
+
+	return f
+}
+
+// Sets data the field
+func (f *Field) WithData(data any) *Field {
+	f.Data = data
+
+	return f
+}
+
+// Resets the field errors
+func (f *Field) ResetErrors() *Field {
+	f.Errors = []validation.Error{}
+
+	return f
+}
+
+// Sets that the field represents a data slice
+func (f *Field) WithSlice() *Field {
+	f.IsSlice = true
+
+	return f
+}
+
+// Sets that the field represents a collection
+func (f *Field) WithCollection() *Field {
+	f.IsCollection = true
+
+	return f
+}
+
+// Sets that the name of the field is not computed
+func (f *Field) WithFixedName() *Field {
+	f.IsFixedName = true
+
+	return f
+}
+
+// Appends constraints
+func (f *Field) WithConstraints(constraints ...validation.Constraint) *Field {
+	for _, constraint := range constraints {
+		f.Constraints = append(f.Constraints, constraint)
+	}
+
+	return f
+}
+
+// Sets a transformer applied to the structure data before displaying it in a field
+func (f *Field) WithBeforeMount(callback func(data any) (any, error)) *Field {
+	f.BeforeMount = callback
+
+	return f
+}
+
+// Sets a transformer applied to the data of a field before defining it in a structure
+func (f *Field) WithBeforeBind(callback func(data any) (any, error)) *Field {
+	f.BeforeBind = callback
+
+	return f
+}
+
+// Appends children
+func (f *Field) Add(children ...*Field) *Field {
+	for _, child := range children {
+		child.Parent = f
+		f.Children = append(f.Children, child)
+	}
+
+	return f
+}
+
+// Checks if the field contains a child using its name
+func (f *Field) HasChild(name string) bool {
+	for _, child := range f.Children {
+		if name == child.Name {
+			return true
+		}
+	}
+
+	return false
+}
+
+// Returns a child using its name
+func (f *Field) GetChild(name string) *Field {
+	var result *Field
+
+	for _, child := range f.Children {
+		if name == child.Name {
+			result = child
+
+			break
+		}
+	}
+
+	return result
+}
+
+// Computes the name of the field
+func (f *Field) GetName() string {
+	var name string
+
+	if f.IsFixedName {
+		return f.Name
+	}
+
+	if f.Form != nil && f.Form.Name != "" {
+		name = fmt.Sprintf("%s%s[%s]", f.Form.Name, f.NamePrefix, f.Name)
+	} else if f.Parent != nil {
+		name = fmt.Sprintf("%s%s[%s]", f.Parent.GetName(), f.NamePrefix, f.Name)
+	} else {
+		name = f.Name
+	}
+
+	return name
+}
+
+// Computes the id of the field
+func (f *Field) GetId() string {
+	name := f.GetName()
+	name = strings.ReplaceAll(name, "[", "-")
+	name = strings.ReplaceAll(name, "]", "")
+	name = strings.ToLower(name)
+
+	return name
+}
+
+// Populates the field with data
+func (f *Field) Mount(data any) error {
+	data, err := f.BeforeMount(data)
+
+	if err != nil {
+		return err
+	}
+
+	if len(f.Children) == 0 {
+		f.Data = data
+
+		return nil
+	}
+
+	props, err := util.InspectStruct(data)
+
+	if err != nil {
+		return err
+	}
+
+	for key, value := range props {
+		if f.HasChild(key) {
+			err = f.GetChild(key).Mount(value)
+
+			if err != nil {
+				return err
+			}
+		}
+	}
+
+	return nil
+}
+
+// Bind the data into the given map
+func (f *Field) Bind(data map[string]any, key *string, parentIsSlice bool) error {
+	if len(f.Children) == 0 {
+		v, err := f.BeforeBind(f.Data)
+
+		if err != nil {
+			return err
+		}
+
+		if key != nil {
+			data[*key] = v
+		} else {
+			data[f.Name] = v
+		}
+
+		return nil
+	}
+
+	data[f.Name] = make(map[string]any)
+
+	for _, child := range f.Children {
+		child.Bind(data[f.Name].(map[string]any), key, f.IsCollection)
+	}
+
+	if f.IsCollection {
+		var nextData []any
+		values := data[f.Name].(map[string]any)
+		var keys []string
+
+		for key, _ := range values {
+			keys = append(keys, key)
+		}
+
+		slices.Sort(keys)
+
+		for _, key := range keys {
+			for valueKey, value := range values {
+				if valueKey == key {
+					nextData = append(nextData, value)
+				}
+			}
+		}
+
+		data[f.Name] = nextData
+	}
+
+	return nil
+}
+
+// Generates a tree of errors
+func (f *Field) ErrorsTree(tree map[string]any, key *string) {
+	var index string
+
+	if key != nil {
+		index = *key
+	} else {
+		index = f.Name
+	}
+
+	if len(f.Children) == 0 {
+		if len(f.Errors) > 0 {
+			tree[index] = map[string]any{
+				"meta": map[string]any{
+					"id":       f.GetId(),
+					"name":     f.Name,
+					"formName": f.GetName(),
+				},
+				"errors": f.Errors,
+			}
+		}
+	} else {
+		errors := make(map[string]any)
+
+		for _, child := range f.Children {
+			if len(child.Errors) > 0 {
+				child.ErrorsTree(errors, &child.Name)
+			}
+		}
+
+		if len(errors) > 0 {
+			tree[index] = map[string]any{
+				"meta": map[string]any{
+					"id":       f.GetId(),
+					"name":     f.Name,
+					"formName": f.GetName(),
+				},
+				"errors":   []validation.Error{},
+				"children": slices.Collect(maps.Values(errors)),
+			}
+		}
+	}
+}
diff --git a/form/field_checkbox.go b/form/field_checkbox.go
new file mode 100644
index 0000000..b4b903c
--- /dev/null
+++ b/form/field_checkbox.go
@@ -0,0 +1,48 @@
+package form
+
+// @license GNU AGPL version 3 or any later version
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+import (
+	"github.com/spf13/cast"
+)
+
+// Generates an input[type=checkbox]
+func NewFieldCheckbox(name string) *Field {
+	f := NewField(name, "input").
+		WithOptions(NewOption("type", "checkbox")).
+		WithBeforeMount(func(data any) (any, error) {
+			switch data.(type) {
+			case string:
+				data = data == "1"
+			case bool:
+				return data, nil
+			}
+
+			return cast.ToInt(data), nil
+		}).
+		WithBeforeBind(func(data any) (any, error) {
+			switch data.(type) {
+			case string:
+				return data == "1", nil
+			case bool:
+				return data, nil
+			}
+
+			return cast.ToBool(data), nil
+		})
+
+	return f
+}
diff --git a/form/field_choice.go b/form/field_choice.go
new file mode 100644
index 0000000..16c06fc
--- /dev/null
+++ b/form/field_choice.go
@@ -0,0 +1,200 @@
+package form
+
+// @license GNU AGPL version 3 or any later version
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+import (
+	"encoding/json"
+	"reflect"
+
+	"github.com/spf13/cast"
+	"gitnet.fr/deblan/go-form/validation"
+)
+
+type Choice struct {
+	Value string
+	Label string
+	Data  any
+}
+
+func (c Choice) Match(value string) bool {
+	return c.Value == value
+}
+
+type Choices struct {
+	Data         any                            `json:"data"`
+	ValueBuilder func(key int, item any) string `json:"-"`
+	LabelBuilder func(key int, item any) string `json:"-"`
+}
+
+func (c *Choices) Match(f *Field, value string) bool {
+	if f.Data == nil {
+		return false
+	}
+
+	if f.IsSlice {
+		v := reflect.ValueOf(f.Data)
+
+		for key, _ := range c.GetChoices() {
+			for i := 0; i < v.Len(); i++ {
+				item := v.Index(i).Interface()
+
+				switch item.(type) {
+				case string:
+					if item == value {
+						return true
+					}
+				default:
+					if c.ValueBuilder(key, item) == value {
+						return true
+					}
+				}
+			}
+		}
+
+		return false
+	}
+
+	return f.Data == value
+}
+
+func (c *Choices) WithValueBuilder(builder func(key int, item any) string) *Choices {
+	c.ValueBuilder = builder
+
+	return c
+}
+
+func (c *Choices) WithLabelBuilder(builder func(key int, item any) string) *Choices {
+	c.LabelBuilder = builder
+
+	return c
+}
+
+func (c *Choices) GetChoices() []Choice {
+	choices := []Choice{}
+
+	v := reflect.ValueOf(c.Data)
+
+	switch v.Kind() {
+	case reflect.Slice, reflect.Array, reflect.String, reflect.Map:
+		for i := 0; i < v.Len(); i++ {
+			choices = append(choices, Choice{
+				Value: c.ValueBuilder(i, v.Index(i).Interface()),
+				Label: c.LabelBuilder(i, v.Index(i).Interface()),
+				Data:  v.Index(i).Interface(),
+			})
+		}
+	}
+
+	return choices
+}
+
+func (c Choices) MarshalJSON() ([]byte, error) {
+	var choices []map[string]string
+
+	v := reflect.ValueOf(c.Data)
+
+	switch v.Kind() {
+	case reflect.Slice, reflect.Array, reflect.String, reflect.Map:
+		for i := 0; i < v.Len(); i++ {
+			choices = append(choices, map[string]string{
+				"value": c.ValueBuilder(i, v.Index(i).Interface()),
+				"label": c.LabelBuilder(i, v.Index(i).Interface()),
+			})
+		}
+	}
+
+	return json.Marshal(choices)
+}
+
+// Generates an instance of Choices
+func NewChoices(items any) *Choices {
+	builder := func(key int, item any) string {
+		return cast.ToString(key)
+	}
+
+	choices := Choices{
+		ValueBuilder: builder,
+		LabelBuilder: builder,
+		Data:         items,
+	}
+
+	return &choices
+}
+
+// Generates inputs (checkbox or radio) or selects
+func NewFieldChoice(name string) *Field {
+	f := NewField(name, "choice").
+		WithOptions(
+			NewOption("choices", &Choices{}),
+			NewOption("expanded", false),
+			NewOption("multiple", false),
+			NewOption("empty_choice_label", "None"),
+		)
+
+	f.Validate = func(field *Field) bool {
+		isValid := field.Validate(field)
+
+		if len(validation.NewNotBlank().Validate(field.Data)) == 0 {
+			choices := field.GetOption("choices").Value.(*Choices)
+			isValidChoice := false
+
+			for _, choice := range choices.GetChoices() {
+				if choices.Match(field, choice.Value) {
+					isValidChoice = true
+				}
+			}
+
+			if !isValidChoice {
+				field.Errors = append(field.Errors, validation.Error("This value is not valid."))
+				isValid = false
+			}
+		}
+
+		return isValid
+	}
+
+	f.WithBeforeBind(func(data any) (any, error) {
+		choices := f.GetOption("choices").Value.(*Choices)
+
+		switch data.(type) {
+		case string:
+			v := data.(string)
+			for _, c := range choices.GetChoices() {
+				if c.Match(v) {
+					return c.Data, nil
+				}
+			}
+		case []string:
+			v := reflect.ValueOf(data)
+			var res []interface{}
+
+			for _, choice := range choices.GetChoices() {
+				for i := 0; i < v.Len(); i++ {
+					item := v.Index(i).Interface().(string)
+					if choice.Match(item) {
+						res = append(res, choice.Data)
+					}
+				}
+			}
+
+			return res, nil
+		}
+
+		return data, nil
+	})
+
+	return f
+}
diff --git a/form/field_collection.go b/form/field_collection.go
new file mode 100644
index 0000000..3f3ece1
--- /dev/null
+++ b/form/field_collection.go
@@ -0,0 +1,80 @@
+package form
+
+// @license GNU AGPL version 3 or any later version
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+import (
+	"fmt"
+	"reflect"
+)
+
+// Generates a sub form
+func NewFieldCollection(name string) *Field {
+	f := NewField(name, "collection").
+		WithOptions(
+			NewOption("allow_add", true),
+			NewOption("allow_delete", true),
+			NewOption("form", nil),
+		).
+		WithCollection()
+
+	f.WithBeforeMount(func(data any) (any, error) {
+		if opt := f.GetOption("form"); opt != nil {
+			if src, ok := opt.Value.(*Form); ok {
+				src.Name = f.GetName()
+				t := reflect.TypeOf(data)
+
+				switch t.Kind() {
+				case reflect.Slice:
+					slice := reflect.ValueOf(data)
+
+					for i := 0; i < slice.Len(); i++ {
+						name := fmt.Sprintf("%d", i)
+						value := slice.Index(i).Interface()
+
+						if f.HasChild(name) {
+							f.GetChild(name).Mount(value)
+						} else {
+							form := src.Copy()
+							form.Mount(value)
+
+							field := f.Copy()
+							field.Widget = "sub_form"
+							field.Name = name
+							field.Add(form.Fields...)
+							field.
+								RemoveOption("form").
+								RemoveOption("label")
+
+							for _, c := range field.Children {
+								c.NamePrefix = fmt.Sprintf("[%d]", i)
+							}
+
+							f.Add(field)
+						}
+					}
+				}
+			}
+		}
+
+		return data, nil
+	})
+
+	return f
+}
+
+func NewCollection(name string) *Field {
+	return NewFieldCollection(name)
+}
diff --git a/form/field_input.go b/form/field_input.go
new file mode 100644
index 0000000..ca42873
--- /dev/null
+++ b/form/field_input.go
@@ -0,0 +1,84 @@
+package form
+
+// @license GNU AGPL version 3 or any later version
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+import (
+	"github.com/spf13/cast"
+)
+
+// Generates an input[type=text]
+func NewFieldText(name string) *Field {
+	f := NewField(name, "input").
+		WithOptions(NewOption("type", "text"))
+
+	return f
+}
+
+// Generates an input[type=number] with default transformers
+func NewFieldNumber(name string) *Field {
+	f := NewField(name, "input").
+		WithOptions(NewOption("type", "number")).
+		WithBeforeBind(func(data any) (any, error) {
+			return cast.ToFloat64(data), nil
+		})
+
+	return f
+}
+
+// Generates an input[type=email]
+func NewFieldMail(name string) *Field {
+	f := NewField(name, "input").
+		WithOptions(NewOption("type", "email"))
+
+	return f
+}
+
+// Generates an input[type=range]
+func NewFieldRange(name string) *Field {
+	f := NewField(name, "input").
+		WithOptions(NewOption("type", "range")).
+		WithBeforeBind(func(data any) (any, error) {
+			return cast.ToFloat64(data), nil
+		})
+
+	return f
+}
+
+// Generates an input[type=password]
+func NewFieldPassword(name string) *Field {
+	f := NewField(name, "input").
+		WithOptions(NewOption("type", "password"))
+
+	return f
+}
+
+// Generates an input[type=hidden]
+func NewFieldHidden(name string) *Field {
+	f := NewField(name, "input").
+		WithOptions(NewOption("type", "hidden"))
+
+	return f
+}
+
+// Generates an input[type=submit]
+func NewSubmit(name string) *Field {
+	f := NewField(name, "input").
+		WithOptions(NewOption("type", "submit"))
+
+	f.Data = "Submit"
+
+	return f
+}
diff --git a/form/field_input_csrf.go b/form/field_input_csrf.go
new file mode 100644
index 0000000..fc3bc3a
--- /dev/null
+++ b/form/field_input_csrf.go
@@ -0,0 +1,23 @@
+package form
+
+// @license GNU AGPL version 3 or any later version
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+func NewFieldCsrf(name string) *Field {
+	f := NewFieldHidden(name).
+		WithFixedName()
+
+	return f
+}
diff --git a/form/field_input_date.go b/form/field_input_date.go
new file mode 100644
index 0000000..893c59d
--- /dev/null
+++ b/form/field_input_date.go
@@ -0,0 +1,109 @@
+package form
+
+// @license GNU AGPL version 3 or any later version
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+import (
+	"fmt"
+	"time"
+)
+
+func DateBeforeMount(data any, format string) (any, error) {
+	if data == nil {
+		return nil, nil
+	}
+
+	switch data.(type) {
+	case string:
+		return data, nil
+	case time.Time:
+		return data.(time.Time).Format(format), nil
+	case *time.Time:
+		v := data.(*time.Time)
+		if v != nil {
+			return v.Format(format), nil
+		}
+	}
+
+	return nil, nil
+}
+
+// Generates an input[type=date] with default transformers
+func NewFieldDate(name string) *Field {
+	f := NewField(name, "input").
+		WithOptions(NewOption("type", "date")).
+		WithBeforeMount(func(data any) (any, error) {
+			return DateBeforeMount(data, "2006-01-02")
+		}).
+		WithBeforeBind(func(data any) (any, error) {
+			return time.Parse(time.DateOnly, data.(string))
+		})
+
+	return f
+}
+
+// Generates an input[type=datetime] with default transformers
+func NewFieldDatetime(name string) *Field {
+	f := NewField(name, "input").
+		WithOptions(NewOption("type", "datetime")).
+		WithBeforeMount(func(data any) (any, error) {
+			return DateBeforeMount(data, "2006-01-02 15:04")
+		}).
+		WithBeforeBind(func(data any) (any, error) {
+			return time.Parse("2006-01-02T15:04", data.(string))
+		})
+
+	return f
+}
+
+// Generates an input[type=datetime-local] with default transformers
+func NewFieldDatetimeLocal(name string) *Field {
+	f := NewField(name, "input").
+		WithOptions(
+			NewOption("type", "datetime-local"),
+		).
+		WithBeforeMount(func(data any) (any, error) {
+			return DateBeforeMount(data, "2006-01-02 15:04")
+		}).
+		WithBeforeBind(func(data any) (any, error) {
+			a, b := time.Parse("2006-01-02T15:04", data.(string))
+
+			return a, b
+		})
+
+	return f
+}
+
+// Generates an input[type=time] with default transformers
+func NewFieldTime(name string) *Field {
+	f := NewField(name, "input").
+		WithOptions(NewOption("type", "time")).
+		WithBeforeMount(func(data any) (any, error) {
+			return DateBeforeMount(data, "15:04")
+		}).
+		WithBeforeBind(func(data any) (any, error) {
+			if data != nil {
+				v := data.(string)
+
+				if len(v) > 0 {
+					return time.Parse(time.TimeOnly, fmt.Sprintf("%s:00", v))
+				}
+			}
+
+			return nil, nil
+		})
+
+	return f
+}
diff --git a/form/field_subform.go b/form/field_subform.go
new file mode 100644
index 0000000..6762ef6
--- /dev/null
+++ b/form/field_subform.go
@@ -0,0 +1,27 @@
+package form
+
+// @license GNU AGPL version 3 or any later version
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+// Generates a sub form
+func NewFieldSubForm(name string) *Field {
+	f := NewField(name, "sub_form")
+
+	return f
+}
+
+func NewSubForm(name string) *Field {
+	return NewFieldSubForm(name)
+}
diff --git a/form/field_textarea.go b/form/field_textarea.go
new file mode 100644
index 0000000..b9045bb
--- /dev/null
+++ b/form/field_textarea.go
@@ -0,0 +1,21 @@
+package form
+
+// @license GNU AGPL version 3 or any later version
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+// Generates a textarea
+func NewFieldTextarea(name string) *Field {
+	return NewField(name, "textarea")
+}
diff --git a/form/form.go b/form/form.go
new file mode 100644
index 0000000..04016d3
--- /dev/null
+++ b/form/form.go
@@ -0,0 +1,321 @@
+package form
+
+// @license GNU AGPL version 3 or any later version
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+import (
+	"encoding/json"
+	"io/ioutil"
+	"maps"
+	"net/http"
+	"net/url"
+	"slices"
+	"strings"
+
+	"github.com/mitchellh/mapstructure"
+	"gitnet.fr/deblan/go-form/util"
+	"gitnet.fr/deblan/go-form/validation"
+)
+
+// Field represents a form
+type Form struct {
+	Fields       []*Field           `json:"children"`
+	GlobalFields []*Field           `json:"-"`
+	Errors       []validation.Error `json:"-"`
+	Method       string             `json:"method"`
+	JsonRequest  bool               `json:"json_request"`
+	Action       string             `json:"action"`
+	Name         string             `json:"name"`
+	Options      []*Option          `json:"options"`
+	RequestData  *url.Values        `json:"-"`
+}
+
+// Generates a new form with default properties
+func NewForm(fields ...*Field) *Form {
+	f := new(Form)
+	f.Method = "POST"
+	f.Name = "form"
+	f.Add(fields...)
+	f.WithOptions(
+		NewOption("attr", Attrs{}),
+		NewOption("help_attr", Attrs{}),
+	)
+
+	return f
+}
+
+// Checks if the form contains an option using its name
+func (f *Form) HasOption(name string) bool {
+	for _, option := range f.Options {
+		if option.Name == name {
+			return true
+		}
+	}
+
+	return false
+}
+
+// Returns an option using its name
+func (f *Form) GetOption(name string) *Option {
+	for _, option := range f.Options {
+		if option.Name == name {
+			return option
+		}
+	}
+
+	return nil
+}
+
+// Resets the form errors
+func (f *Form) ResetErrors() *Form {
+	f.Errors = []validation.Error{}
+
+	return f
+}
+
+// Appends children
+func (f *Form) Add(fields ...*Field) {
+	for _, field := range fields {
+		field.Form = f
+		f.Fields = append(f.Fields, field)
+	}
+}
+
+// Configures its children deeply
+// This function must be called after adding all fields
+func (f *Form) End() *Form {
+	f.GlobalFields = []*Field{}
+
+	for _, c := range f.Fields {
+		f.AddGlobalField(c)
+	}
+
+	return f
+}
+
+// Configures its children deeply
+func (f *Form) AddGlobalField(field *Field) {
+	f.GlobalFields = append(f.GlobalFields, field)
+
+	for _, c := range field.Children {
+		f.AddGlobalField(c)
+	}
+}
+
+// Checks if the form contains a child using its name
+func (f *Form) HasField(name string) bool {
+	for _, field := range f.Fields {
+		if name == field.Name {
+			return true
+		}
+	}
+
+	return false
+}
+
+// Returns a child using its name
+func (f *Form) GetField(name string) *Field {
+	var result *Field
+
+	for _, field := range f.Fields {
+		if name == field.Name {
+			result = field
+			break
+		}
+	}
+
+	return result
+}
+
+// Sets the method of the format (http.MethodPost, http.MethodGet, ...)
+func (f *Form) WithMethod(v string) *Form {
+	f.Method = v
+
+	return f
+}
+
+// Sets the name of the form (used to compute name of fields)
+func (f *Form) WithName(v string) *Form {
+	f.Name = v
+
+	return f
+}
+
+// Sets the action of the form (eg: "/")
+func (f *Form) WithAction(v string) *Form {
+	f.Action = v
+
+	return f
+}
+
+// Appends options to the form
+func (f *Form) WithOptions(options ...*Option) *Form {
+	for _, option := range options {
+		if f.HasOption(option.Name) {
+			f.GetOption(option.Name).Value = option.Value
+		} else {
+			f.Options = append(f.Options, option)
+		}
+	}
+
+	return f
+}
+
+// Checks the a form is valid
+func (f *Form) IsValid() bool {
+	isValid := true
+	f.ResetErrors()
+
+	for _, field := range f.Fields {
+		fieldIsValid := field.Validate(field)
+		isValid = isValid && fieldIsValid
+	}
+
+	return isValid
+}
+
+// Copies datas from a struct to the form
+func (f *Form) Mount(data any) error {
+	props, err := util.InspectStruct(data)
+
+	if err != nil {
+		return err
+	}
+
+	for key, value := range props {
+		if f.HasField(key) {
+			err = f.GetField(key).Mount(value)
+
+			if err != nil {
+				return err
+			}
+		}
+	}
+
+	return nil
+}
+
+func (f *Form) WithJsonRequest() *Form {
+	f.JsonRequest = true
+
+	return f
+}
+
+// Copies datas from the form to a struct
+func (f *Form) Bind(data any) error {
+	toBind := make(map[string]any)
+
+	for _, field := range f.Fields {
+		field.Bind(toBind, nil, false)
+	}
+
+	return mapstructure.Decode(toBind, data)
+}
+
+// Processes a request
+func (f *Form) HandleRequest(req *http.Request) {
+	var data url.Values
+
+	if f.JsonRequest {
+		body, err := ioutil.ReadAll(req.Body)
+
+		if err != nil {
+			return
+		}
+
+		mapping := make(map[string]any)
+		err = json.Unmarshal(body, &mapping)
+
+		if err != nil {
+			return
+		}
+
+		data = url.Values{}
+		util.MapToUrlValues(&data, f.Name, mapping)
+	} else {
+		switch f.Method {
+		case "GET":
+			data = req.URL.Query()
+		default:
+			req.ParseForm()
+			data = req.Form
+		}
+	}
+
+	isSubmitted := false
+
+	type collectionData map[string]any
+
+	for _, c := range f.GlobalFields {
+		if c.IsCollection {
+			collection := util.NewCollection()
+
+			for key, _ := range data {
+				if strings.HasPrefix(key, c.GetName()) {
+					root := strings.Replace(key, c.GetName(), "", 1)
+					indexes := util.ExtractDataIndexes(root)
+
+					collection.Add(indexes, data.Get(key))
+				}
+			}
+
+			c.Mount(collection.Slice())
+		} else if data.Has(c.GetName()) {
+			isSubmitted = true
+
+			if c.IsSlice {
+				c.Mount(data[c.GetName()])
+			} else {
+				c.Mount(data.Get(c.GetName()))
+			}
+		}
+	}
+
+	if isSubmitted {
+		f.RequestData = &data
+	}
+}
+
+// Checks if the form is submitted
+func (f *Form) IsSubmitted() bool {
+	return f.RequestData != nil
+}
+
+// Generates a tree of errors
+func (f *Form) ErrorsTree() map[string]any {
+	errors := make(map[string]any)
+
+	for _, field := range f.Fields {
+		field.ErrorsTree(errors, nil)
+	}
+
+	return map[string]any{
+		"errors":   f.Errors,
+		"children": slices.Collect(maps.Values(errors)),
+	}
+}
+
+func (f *Form) Copy() *Form {
+	var fields []*Field
+
+	for _, i := range f.Fields {
+		f := *i
+		fields = append(fields, &f)
+	}
+
+	return &Form{
+		Fields: fields,
+	}
+}
diff --git a/form/option.go b/form/option.go
new file mode 100644
index 0000000..95eee67
--- /dev/null
+++ b/form/option.go
@@ -0,0 +1,78 @@
+package form
+
+import "strings"
+
+// @license GNU AGPL version 3 or any later version
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+type Option struct {
+	Name  string `json:"name"`
+	Value any    `json:"value"`
+}
+
+func NewOption(name string, value any) *Option {
+	return &Option{
+		Name:  name,
+		Value: value,
+	}
+}
+
+func (o *Option) AsBool() bool {
+	return o.Value.(bool)
+}
+
+func (o *Option) AsString() string {
+	return o.Value.(string)
+}
+
+func (o *Option) AsAttrs() Attrs {
+	return o.Value.(Attrs)
+}
+
+type Attrs map[string]string
+
+func (a Attrs) Append(name, value string) {
+	v, ok := a[name]
+
+	if !ok {
+		v = value
+	} else {
+		v = value + " " + v
+	}
+
+	a[name] = v
+}
+
+func (a Attrs) Prepend(name, value string) {
+	v, ok := a[name]
+
+	if !ok {
+		v = value
+	} else {
+		v += " " + value
+	}
+
+	a[name] = v
+}
+
+func (a Attrs) Remove(name, value string) {
+	v, ok := a[name]
+
+	if !ok {
+		v = strings.ReplaceAll(v, value, "")
+	}
+
+	a[name] = v
+}
diff --git a/go.mod b/go.mod
index 0d1a3b6..20dda1e 100644
--- a/go.mod
+++ b/go.mod
@@ -1,5 +1,11 @@
-module gitnet.fr/deblan/go-form-doc
+module gitnet.fr/deblan/go-form
 
 go 1.23.0
 
-require github.com/imfing/hextra v0.9.7 // indirect
+require (
+	github.com/iancoleman/strcase v0.3.0
+	github.com/mitchellh/mapstructure v1.5.0
+	github.com/spf13/cast v1.9.2
+	github.com/yassinebenaid/godump v0.11.1
+	maragu.dev/gomponents v1.1.0
+)
diff --git a/go.sum b/go.sum
index 8501da6..c6c8a71 100644
--- a/go.sum
+++ b/go.sum
@@ -1,2 +1,20 @@
-github.com/imfing/hextra v0.9.7 h1:Zg5n24us36Bn/S/5mEUPkRW6uwE6vHHEqWSgN0bPXaM=
-github.com/imfing/hextra v0.9.7/go.mod h1:cEfel3lU/bSx7lTE/+uuR4GJaphyOyiwNR3PTqFTXpI=
+github.com/frankban/quicktest v1.14.6 h1:7Xjx+VpznH+oBnejlPUj8oUpdxnVs4f8XU8WnHkI4W8=
+github.com/frankban/quicktest v1.14.6/go.mod h1:4ptaffx2x8+WTWXmUCuVU6aPUX1/Mz7zb5vbUoiM6w0=
+github.com/google/go-cmp v0.5.9 h1:O2Tfq5qg4qc4AmwVlvv0oLiVAGB7enBSJ2x2DqQFi38=
+github.com/google/go-cmp v0.5.9/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
+github.com/iancoleman/strcase v0.3.0 h1:nTXanmYxhfFAMjZL34Ov6gkzEsSJZ5DbhxWjvSASxEI=
+github.com/iancoleman/strcase v0.3.0/go.mod h1:iwCmte+B7n89clKwxIoIXy/HfoL7AsD47ZCWhYzw7ho=
+github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
+github.com/kr/pretty v0.3.1/go.mod h1:hoEshYVHaxMs3cyo3Yncou5ZscifuDolrwPKZanG3xk=
+github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
+github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
+github.com/mitchellh/mapstructure v1.5.0 h1:jeMsZIYE/09sWLaz43PL7Gy6RuMjD2eJVyuac5Z2hdY=
+github.com/mitchellh/mapstructure v1.5.0/go.mod h1:bFUtVrKA4DC2yAKiSyO/QUcy7e+RRV2QTWOzhPopBRo=
+github.com/rogpeppe/go-internal v1.9.0 h1:73kH8U+JUqXU8lRuOHeVHaa/SZPifC7BkcraZVejAe8=
+github.com/rogpeppe/go-internal v1.9.0/go.mod h1:WtVeX8xhTBvf0smdhujwtBcq4Qrzq/fJaraNFVN+nFs=
+github.com/spf13/cast v1.9.2 h1:SsGfm7M8QOFtEzumm7UZrZdLLquNdzFYfIbEXntcFbE=
+github.com/spf13/cast v1.9.2/go.mod h1:jNfB8QC9IA6ZuY2ZjDp0KtFO2LZZlg4S/7bzP6qqeHo=
+github.com/yassinebenaid/godump v0.11.1 h1:SPujx/XaYqGDfmNh7JI3dOyCUVrG0bG2duhO3Eh2EhI=
+github.com/yassinebenaid/godump v0.11.1/go.mod h1:dc/0w8wmg6kVIvNGAzbKH1Oa54dXQx8SNKh4dPRyW44=
+maragu.dev/gomponents v1.1.0 h1:iCybZZChHr1eSlvkWp/JP3CrZGzctLudQ/JI3sBcO4U=
+maragu.dev/gomponents v1.1.0/go.mod h1:oEDahza2gZoXDoDHhw8jBNgH+3UR5ni7Ur648HORydM=
diff --git a/hugo.yaml b/hugo.yaml
deleted file mode 100644
index 6211413..0000000
--- a/hugo.yaml
+++ /dev/null
@@ -1,104 +0,0 @@
-baseURL: https://deblan.gitnet.page/go-form/
-languageCode: en-us
-title: deblan/go-form
-
-outputs:
-  home: [HTML]
-  page: [HTML]
-  section: [HTML, RSS]
-
-enableRobotsTXT: true
-hasCJKLanguage: true
-enableInlineShortcodes: true
-
-menu:
-  main:
-    - identifier: documentation
-      name: Documentation
-      pageRef: /docs
-      weight: 1
-    - name: Search
-      weight: 6
-      params:
-        type: search
-    - name: GitHub
-      weight: 7
-      url: "https://gitnet.fr/deblan/go-form"
-      params:
-        icon: github
-
-  sidebar: []
-    # - identifier: installation
-    #   name: Installation
-    #   weight: 2
-
-
-params:
-  description: Creating and processing HTML forms in golang
-  navbar:
-    displayTitle: true
-    displayLogo: true
-    logo:
-      path: images/logo.svg
-      dark: images/logo-dark.svg
-      # width: 40
-      # height: 20
-      # link: /
-    width: full
-
-  page:
-    width: full
-
-  theme:
-    # light | dark | system
-    default: system
-    displayToggle: true
-
-  footer:
-    enable: true
-    displayCopyright: false
-    displayPoweredBy: false
-    width: normal
-
-  # Display the last modification date
-  displayUpdatedDate: true
-  dateFormat: "January 2, 2006"
-
-  search:
-    enable: true
-    type: flexsearch
-
-    flexsearch:
-      # index page by: content | summary | heading | title
-      index: content
-      # full | forward | reverse | strict
-      # https://github.com/nextapps-de/flexsearch/#tokenizer-prefix-search
-      tokenize: forward
-
-  toc:
-    displayTags: true
-
-  highlight:
-    copy:
-      enable: true
-      # hover | always
-      display: hover
-
-markup:
-  highlight:
-    noClasses: false
-  goldmark:
-    renderer:
-      unsafe: true
-    extensions:
-      passthrough:
-        delimiters:
-          block: [['\[', '\]'], ['$$', '$$']]
-          inline: [['\(', '\)']]
-        enable: true
-
-enableInlineShortcodes: true
-
-module:
-  imports:
-    - path: github.com/imfing/hextra
diff --git a/layouts/partials/custom/footer.html b/layouts/partials/custom/footer.html
deleted file mode 100644
index 092814c..0000000
--- a/layouts/partials/custom/footer.html
+++ /dev/null
@@ -1 +0,0 @@
-<script src="{{ "js/custom.js"|absURL }}"></script>
diff --git a/layouts/shortcodes/goplay-auto-import-main.html b/layouts/shortcodes/goplay-auto-import-main.html
deleted file mode 100644
index adc4f0b..0000000
--- a/layouts/shortcodes/goplay-auto-import-main.html
+++ /dev/null
@@ -1,28 +0,0 @@
-{{ $id := md5 .Inner }} {{ .Inner }}
-
-<details>
-  <summary class="hugo-goplay-summary">Test me</summary>
-  <textarea readonly class="hugo-goplay-textarea" id="textarea-{{ $id }}"></textarea>
-  <div id="{{ $id }}" class="hugo-goplay-result"></div>
-  <div class="hugo-goplay-toolbox">
-    <button role="button" class="hugo-goplay-button" id="hugo-goplay-tool-{{ $id }}-run">
-      Run
-    </button>
-    <button role="button" class="hugo-goplay-button" id="hugo-goplay-tool-{{ $id }}-try">
-      Try it yourself &#8599;
-    </button>
-    <button role="button" class="hugo-goplay-button" id="hugo-goplay-tool-{{ $id }}-share">
-      Share &#8599;
-    </button>
-  </div>
-</details>
-
-<script type="module">
-  import { GoPlayProxy } from "https://unpkg.com/@ggicci/goplay/dist/index.js";
-
-  createPlaygroundWithAutoImportMail(
-    new GoPlayProxy("https://gp.deblan.gitnet.page"),
-    "{{ $id }}",
-    "{{ .Inner }}"
-  )
-</script>
diff --git a/layouts/shortcodes/goplay-field.html b/layouts/shortcodes/goplay-field.html
deleted file mode 100644
index 177a83b..0000000
--- a/layouts/shortcodes/goplay-field.html
+++ /dev/null
@@ -1,28 +0,0 @@
-{{ $id := md5 .Inner }} {{ .Inner }}
-
-<details>
-  <summary class="hugo-goplay-summary">Test me</summary>
-  <textarea readonly class="hugo-goplay-textarea" id="textarea-{{ $id }}"></textarea>
-  <div id="{{ $id }}" class="hugo-goplay-result"></div>
-  <div class="hugo-goplay-toolbox">
-    <button role="button" class="hugo-goplay-button" id="hugo-goplay-tool-{{ $id }}-run">
-      Run
-    </button>
-    <button role="button" class="hugo-goplay-button" id="hugo-goplay-tool-{{ $id }}-try">
-      Try it yourself &#8599;
-    </button>
-    <button role="button" class="hugo-goplay-button" id="hugo-goplay-tool-{{ $id }}-share">
-      Share &#8599;
-    </button>
-  </div>
-</details>
-
-<script type="module">
-  import { GoPlayProxy } from "https://unpkg.com/@ggicci/goplay/dist/index.js";
-
-  createFieldPlayground(
-    new GoPlayProxy("https://gp.deblan.gitnet.page"),
-    "{{ $id }}",
-    "{{ .Inner }}"
-  )
-</script>
diff --git a/static/js/custom.js b/static/js/custom.js
deleted file mode 100644
index e8d886e..0000000
--- a/static/js/custom.js
+++ /dev/null
@@ -1,126 +0,0 @@
-function normalizeCode(code) {
-  return code
-    .trim()
-    .replace(/^```go/, '')
-    .replace(/^```/, '')
-    .replace(/```$/, '')
-    .replace(/<([^>]+)>/g, '')
-    .trim()
-}
-
-function updatePlaygroundView(goplay, id, code) {
-  const textarea = document.getElementById(`textarea-${id}`)
-
-  textarea.value = code
-  textarea.style.height = textarea.scrollHeight + 'px';
-  textarea.style.overflowY = 'hidden';
-
-  textarea.addEventListener('input', function() {
-    this.style.height = 'auto';
-    this.style.height = this.scrollHeight + 'px';
-  })
-
-  const toolRun = document.getElementById(`hugo-goplay-tool-${id}-run`)
-  const toolTry = document.getElementById(`hugo-goplay-tool-${id}-try`)
-  const toolShare = document.getElementById(`hugo-goplay-tool-${id}-share`)
-
-  toolRun.addEventListener('click', () => {
-    const parent = document.getElementById(id)
-    const pre = document.createElement('pre')
-    const container = document.createElement('code')
-
-    container.classList.add('text')
-    pre.appendChild(container)
-    parent.replaceChildren(pre)
-
-    goplay.renderCompile(container, textarea.value);
-  });
-
-  [toolTry, toolShare].forEach((v) => {
-    v.addEventListener('click', async () => {
-      const shareUrl = await goplay.share(code)
-      window.open(shareUrl, '_blank').focus();
-    })
-  });
-}
-
-function createFieldPlayground(goplay, id, code) {
-  code = createFieldPlaygroundCode(code)
-
-  updatePlaygroundView(goplay, id, code)
-}
-
-function createPlaygroundWithAutoImportMail(goplay, id, code) {
-  let lines = normalizeCode(code).split("\n")
-  let results = ["package main", ""]
-  let imports = []
-  let body = []
-
-  lines.forEach((line) => {
-    if (line.substr(0, 7) === '@import') {
-      imports.push('    ' + line.replace('@import', '').trim())
-    } else {
-      body.push("    " + line)
-    }
-  })
-
-  if (imports.length > 0) {
-    results.push("import (")
-
-    imports.forEach((v) => {
-      results.push(v)
-    })
-
-    results.push(")", "")
-  }
-
-  results.push("func main() {")
-
-  body.forEach((v, i) => {
-    if (i == 0 && v.trim() == "") {
-      return
-    }
-
-    results.push(v)
-  })
-
-  results.push("}", "")
-
-  updatePlaygroundView(goplay, id, results.join("\n"))
-}
-
-function createFieldPlaygroundCode(code) {
-  code = normalizeCode(code)
-  let lines = code.split("\n");
-
-  for (let i in lines) {
-  lines[i] = ['    ', lines[i]].join('')
-  }
-
-  code = lines.join("\n");
-
-  return `package main
-
-import (
-    "fmt"
-    "html/template"
-    "strings"
-
-    "gitnet.fr/deblan/go-form/form"
-    "gitnet.fr/deblan/go-form/theme"
-)
-
-func main() {
-${code}
-
-    r(form.NewForm(field))
-}
-
-func r(f *form.Form) {
-    render := theme.NewRenderer(theme.Html5)
-    tpl, _ := template.New("example").Funcs(render.FuncMap()).Parse(\`{{ form_widget (.Form.GetField "Foo") }}\`)
-    b := new(strings.Builder)
-    tpl.Execute(b, map[string]any{"Form": f})
-    fmt.Println(b.String())
-}`
-}
diff --git a/theme/bootstrap5.go b/theme/bootstrap5.go
new file mode 100644
index 0000000..525bdb8
--- /dev/null
+++ b/theme/bootstrap5.go
@@ -0,0 +1,134 @@
+package theme
+
+import (
+	"gitnet.fr/deblan/go-form/form"
+	"gitnet.fr/deblan/go-form/validation"
+	. "maragu.dev/gomponents"
+	. "maragu.dev/gomponents/html"
+)
+
+// @license GNU AGPL version 3 or any later version
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+var Bootstrap5 = ExtendTheme(Html5, func() map[string]RenderFunc {
+	theme := make(map[string]RenderFunc)
+
+	theme["form_help"] = func(parent map[string]RenderFunc, args ...any) Node {
+		form := args[0].(*form.Form)
+
+		form.GetOption("help_attr").AsAttrs().Append("class", "form-text")
+
+		return parent["base_form_help"](parent, form)
+	}
+
+	theme["form_widget_help"] = func(parent map[string]RenderFunc, args ...any) Node {
+		field := args[0].(*form.Field)
+
+		field.GetOption("help_attr").AsAttrs().Append("class", "form-text")
+
+		return parent["base_form_widget_help"](parent, field)
+	}
+
+	theme["input"] = func(parent map[string]RenderFunc, args ...any) Node {
+		field := args[0].(*form.Field)
+		fieldType := field.GetOption("type").AsString()
+
+		var class string
+
+		if fieldType == "checkbox" || fieldType == "radio" {
+			class = "form-check-input"
+		} else if fieldType == "range" {
+			class = "form-range"
+		} else if fieldType == "button" || fieldType == "submit" || fieldType == "reset" {
+			class = "btn"
+		} else {
+			class = "form-control"
+		}
+
+		field.GetOption("attr").AsAttrs().Append("class", class)
+
+		return parent["base_input"](parent, field)
+	}
+
+	theme["form_label"] = func(parent map[string]RenderFunc, args ...any) Node {
+		field := args[0].(*form.Field)
+
+		var class string
+
+		if field.Widget == "choice" && field.HasOption("expanded") && field.GetOption("expanded").AsBool() {
+			class = "form-check-label"
+		} else {
+			class = "form-label"
+		}
+
+		field.GetOption("label_attr").AsAttrs().Append("class", class)
+
+		return parent["base_form_label"](parent, field)
+	}
+
+	theme["choice"] = func(parent map[string]RenderFunc, args ...any) Node {
+		field := args[0].(*form.Field)
+
+		if !field.HasOption("expanded") || !field.GetOption("expanded").AsBool() {
+			field.GetOption("attr").AsAttrs().Append("class", "form-control")
+		}
+
+		return parent["base_choice"](parent, field)
+	}
+
+	theme["choice_expanded_item"] = func(parent map[string]RenderFunc, args ...any) Node {
+		return Div(Class("form-check"), args[0].(Node))
+	}
+
+	theme["textarea"] = func(parent map[string]RenderFunc, args ...any) Node {
+		field := args[0].(*form.Field)
+
+		field.GetOption("attr").AsAttrs().Append("class", "form-control")
+
+		return parent["base_textarea"](parent, field)
+	}
+
+	theme["form_row"] = func(parent map[string]RenderFunc, args ...any) Node {
+		field := args[0].(*form.Field)
+
+		if field.HasOption("type") {
+			fieldType := field.GetOption("type").AsString()
+
+			if fieldType == "checkbox" || fieldType == "radio" {
+				field.GetOption("row_attr").AsAttrs().Append("class", "form-check")
+			}
+		}
+
+		return parent["base_form_row"](parent, field)
+	}
+
+	theme["errors"] = func(parent map[string]RenderFunc, args ...any) Node {
+		errors := args[0].([]validation.Error)
+
+		var result []Node
+
+		for _, v := range errors {
+			result = append(result, Text(string(v)))
+			result = append(result, Br())
+		}
+
+		return Div(
+			Class("invalid-feedback d-block"),
+			Group(result),
+		)
+	}
+
+	return theme
+})
diff --git a/theme/html5.go b/theme/html5.go
new file mode 100644
index 0000000..2d7889e
--- /dev/null
+++ b/theme/html5.go
@@ -0,0 +1,466 @@
+package theme
+
+import (
+	"bytes"
+	"fmt"
+
+	"github.com/spf13/cast"
+	"gitnet.fr/deblan/go-form/form"
+	"gitnet.fr/deblan/go-form/validation"
+	. "maragu.dev/gomponents"
+	. "maragu.dev/gomponents/html"
+)
+
+// @license GNU AGPL version 3 or any later version
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+var Html5 = CreateTheme(func() map[string]RenderFunc {
+	theme := make(map[string]RenderFunc)
+
+	theme["attributes"] = func(parent map[string]RenderFunc, args ...any) Node {
+		var result []Node
+
+		for i, v := range args[0].(form.Attrs) {
+			result = append(result, Attr(i, v))
+		}
+
+		return Group(result)
+	}
+
+	theme["form_attributes"] = func(parent map[string]RenderFunc, args ...any) Node {
+		form := args[0].(*form.Form)
+
+		if !form.HasOption("attr") {
+			return Raw("")
+		}
+
+		return parent["attributes"](parent, form.GetOption("attr").AsAttrs())
+	}
+
+	theme["errors"] = func(parent map[string]RenderFunc, args ...any) Node {
+		errors := args[0].([]validation.Error)
+
+		var result []Node
+
+		for _, v := range errors {
+			result = append(result, Li(Text(string(v))))
+		}
+
+		return Ul(
+			Class("gf-errors"),
+			Group(result),
+		)
+	}
+
+	theme["form_errors"] = func(parent map[string]RenderFunc, args ...any) Node {
+		form := args[0].(*form.Form)
+
+		return If(
+			len(form.Errors) > 0,
+			parent["errors"](parent, form.Errors),
+		)
+	}
+
+	theme["form_widget_errors"] = func(parent map[string]RenderFunc, args ...any) Node {
+		field := args[0].(*form.Field)
+
+		return If(
+			len(field.Errors) > 0,
+			parent["errors"](parent, field.Errors),
+		)
+	}
+
+	theme["help"] = func(parent map[string]RenderFunc, args ...any) Node {
+		help := args[0].(string)
+		var extra Node
+
+		if len(help) == 0 {
+			return Raw("")
+		}
+
+		if len(args) == 2 {
+			extra = args[1].(Node)
+		}
+
+		return Div(
+			Class("gf-help"),
+			Text(help),
+			extra,
+		)
+	}
+
+	theme["form_help"] = func(parent map[string]RenderFunc, args ...any) Node {
+		form := args[0].(*form.Form)
+
+		if !form.HasOption("help") {
+			return Raw("")
+		}
+
+		return parent["help"](
+			parent,
+			form.GetOption("help").AsString(),
+			parent["attributes"](parent, form.GetOption("help_attr").AsAttrs()),
+		)
+	}
+
+	theme["form_widget_help"] = func(parent map[string]RenderFunc, args ...any) Node {
+		field := args[0].(*form.Field)
+
+		if !field.HasOption("help") {
+			return Raw("")
+		}
+
+		return parent["help"](
+			parent,
+			field.GetOption("help").AsString(),
+			parent["attributes"](parent, field.GetOption("help_attr").AsAttrs()),
+		)
+	}
+
+	theme["label_attributes"] = func(parent map[string]RenderFunc, args ...any) Node {
+		field := args[0].(*form.Field)
+
+		return parent["attributes"](parent, field.GetOption("label_attr").AsAttrs())
+	}
+
+	theme["form_label"] = func(parent map[string]RenderFunc, args ...any) Node {
+		field := args[0].(*form.Field)
+
+		if !field.HasOption("label") {
+			return Raw("")
+		}
+
+		label := field.GetOption("label").AsString()
+
+		return If(len(label) > 0, Label(
+			For(field.GetId()),
+			parent["label_attributes"](parent, field),
+			Text(label),
+		))
+	}
+
+	theme["field_attributes"] = func(parent map[string]RenderFunc, args ...any) Node {
+		field := args[0].(*form.Field)
+
+		return parent["attributes"](parent, field.GetOption("attr").AsAttrs())
+	}
+
+	theme["textarea_attributes"] = func(parent map[string]RenderFunc, args ...any) Node {
+		return parent["field_attributes"](parent, args...)
+	}
+
+	theme["input_attributes"] = func(parent map[string]RenderFunc, args ...any) Node {
+		return parent["field_attributes"](parent, args...)
+	}
+
+	theme["sub_form_attributes"] = func(parent map[string]RenderFunc, args ...any) Node {
+		return parent["field_attributes"](parent, args...)
+	}
+
+	theme["input"] = func(parent map[string]RenderFunc, args ...any) Node {
+		field := args[0].(*form.Field)
+		fieldType := "text"
+
+		if field.HasOption("type") {
+			fieldType = field.GetOption("type").AsString()
+		}
+
+		value := cast.ToString(field.Data)
+
+		if fieldType == "checkbox" {
+			value = "1"
+		}
+
+		return Input(
+			Name(field.GetName()),
+			ID(field.GetId()),
+			Type(fieldType),
+			Value(value),
+			If(fieldType == "checkbox" && field.Data != nil && field.Data != false, Checked()),
+			If(field.HasOption("required") && field.GetOption("required").AsBool(), Required()),
+			parent["input_attributes"](parent, field),
+		)
+	}
+
+	theme["choice_options"] = func(parent map[string]RenderFunc, args ...any) Node {
+		field := args[0].(*form.Field)
+		choices := field.GetOption("choices").Value.(*form.Choices)
+
+		isRequired := field.HasOption("required") && field.GetOption("required").AsBool()
+		isMultiple := field.GetOption("multiple").AsBool()
+
+		var options []Node
+
+		if !isMultiple && !isRequired {
+			options = append(options, Option(
+				Text(field.GetOption("empty_choice_label").AsString()),
+			))
+		}
+
+		for _, choice := range choices.GetChoices() {
+			options = append(options, Option(
+				Value(choice.Value),
+				Text(choice.Label),
+				If(choices.Match(field, choice.Value), Selected()),
+			))
+		}
+
+		return Group(options)
+	}
+
+	theme["choice_expanded_item"] = func(parent map[string]RenderFunc, args ...any) Node {
+		return args[0].(Node)
+	}
+
+	theme["choice_attributes"] = func(parent map[string]RenderFunc, args ...any) Node {
+		return parent["field_attributes"](parent, args...)
+	}
+
+	theme["choice_expanded"] = func(parent map[string]RenderFunc, args ...any) Node {
+		field := args[0].(*form.Field)
+		choices := field.GetOption("choices").Value.(*form.Choices)
+
+		isRequired := field.HasOption("required") && field.GetOption("required").AsBool()
+		isMultiple := field.GetOption("multiple").AsBool()
+		noneLabel := field.GetOption("empty_choice_label").AsString()
+
+		var items []Node
+
+		if !isMultiple && !isRequired {
+			id := fmt.Sprintf("%s-%s", field.GetId(), "none")
+
+			items = append(items, parent["choice_expanded_item"](parent, Group([]Node{
+				Input(
+					Name(field.GetName()),
+					ID(id),
+					Value(""),
+					Type("radio"),
+					parent["choice_attributes"](parent, field),
+					If(cast.ToString(field.Data) == "", Checked()),
+				),
+				Label(
+					For(id),
+					Text(noneLabel),
+					parent["label_attributes"](parent, field),
+				),
+			})))
+		}
+
+		for key, choice := range choices.GetChoices() {
+			id := fmt.Sprintf("%s-%d", field.GetId(), key)
+
+			items = append(items, parent["choice_expanded_item"](parent, Group([]Node{
+				Input(
+					Name(field.GetName()),
+					ID(id),
+					Value(choice.Value),
+					If(isMultiple, Type("checkbox")),
+					If(!isMultiple, Type("radio")),
+					parent["choice_attributes"](parent, field),
+					If(choices.Match(field, choice.Value), Checked()),
+				),
+				Label(
+					For(id),
+					Text(choice.Label),
+					parent["label_attributes"](parent, field),
+				),
+			})))
+		}
+
+		return Group(items)
+	}
+
+	theme["choice"] = func(parent map[string]RenderFunc, args ...any) Node {
+		field := args[0].(*form.Field)
+
+		isRequired := field.HasOption("required") && field.GetOption("required").AsBool()
+		isExpanded := field.GetOption("expanded").AsBool()
+		isMultiple := field.GetOption("multiple").AsBool()
+		noneLabel := field.GetOption("empty_choice_label").AsString()
+
+		_ = noneLabel
+
+		if isExpanded {
+			return parent["choice_expanded"](parent, field)
+		} else {
+			return Select(
+				ID(field.GetId()),
+				If(isRequired, Required()),
+				If(isMultiple, Multiple()),
+				Name(field.GetName()),
+				parent["choice_attributes"](parent, field),
+				parent["choice_options"](parent, field),
+			)
+		}
+	}
+
+	theme["textarea"] = func(parent map[string]RenderFunc, args ...any) Node {
+		field := args[0].(*form.Field)
+
+		return Textarea(
+			Name(field.GetName()),
+			ID(field.GetId()),
+			If(field.HasOption("required") && field.GetOption("required").AsBool(), Required()),
+			parent["textarea_attributes"](parent, field),
+			Text(cast.ToString(field.Data)),
+		)
+	}
+
+	theme["sub_form_label"] = func(parent map[string]RenderFunc, args ...any) Node {
+		field := args[0].(*form.Field)
+
+		if !field.HasOption("label") {
+			return Raw("")
+		}
+
+		label := field.GetOption("label").AsString()
+
+		return If(len(label) > 0, Legend(
+			parent["label_attributes"](parent, field),
+			Text(label),
+		))
+
+	}
+
+	theme["sub_form_content"] = func(parent map[string]RenderFunc, args ...any) Node {
+		field := args[0].(*form.Field)
+
+		return parent["form_fields"](parent, field.Children)
+	}
+
+	theme["sub_form"] = func(parent map[string]RenderFunc, args ...any) Node {
+		field := args[0].(*form.Field)
+
+		return FieldSet(
+			ID(field.GetId()),
+			parent["sub_form_label"](parent, field),
+			parent["sub_form_attributes"](parent, field),
+			parent["sub_form_content"](parent, field),
+		)
+	}
+
+	theme["collection"] = func(parent map[string]RenderFunc, args ...any) Node {
+		field := args[0].(*form.Field)
+
+		var prototype string
+
+		if opt := field.GetOption("form"); opt != nil {
+			if val, ok := opt.Value.(*form.Form); ok {
+				var buffer bytes.Buffer
+				dest := form.NewFieldSubForm(field.Name)
+
+				for _, c := range val.Fields {
+					child := c.Copy()
+					child.NamePrefix = "[__name__]"
+					dest.Add(child)
+				}
+
+				fieldPrototype := parent["form_row"](parent, dest)
+				fieldPrototype.Render(&buffer)
+
+				prototype = buffer.String()
+			}
+		}
+
+		field.WithOptions(form.NewOption("prototype", prototype))
+		field.Widget = "collection_build"
+
+		return parent["form_widget"](parent, field)
+	}
+
+	theme["collection_build"] = func(parent map[string]RenderFunc, args ...any) Node {
+		field := args[0].(*form.Field)
+		prototype := field.GetOption("prototype").AsString()
+		var items []Node
+
+		for _, child := range field.Children {
+			items = append(items, parent["form_row"](parent, child))
+		}
+
+		return Div(
+			Attr("data-prototype", prototype),
+			Group(items),
+		)
+	}
+
+	theme["form_widget"] = func(parent map[string]RenderFunc, args ...any) Node {
+		field := args[0].(*form.Field)
+
+		tpl, ok := parent[field.Widget]
+
+		if !ok {
+			return Raw("Invalid field widget: " + field.Widget)
+		}
+
+		return tpl(parent, field)
+	}
+
+	theme["form_row"] = func(parent map[string]RenderFunc, args ...any) Node {
+		field := args[0].(*form.Field)
+
+		isCheckbox := field.HasOption("type") && field.GetOption("type").AsString() == "checkbox"
+		hasChildren := len(field.Children) > 0
+		labelAfter := isCheckbox && !hasChildren
+		label := parent["form_label"](parent, field)
+		attrs := Raw("")
+
+		if field.HasOption("row_attr") {
+			attrs = parent["attributes"](parent, field.GetOption("row_attr").AsAttrs())
+		}
+
+		return Div(
+			attrs,
+			If(!labelAfter, label),
+			parent["form_widget_errors"](parent, field),
+			parent["form_widget"](parent, field),
+			If(labelAfter, label),
+			parent["form_widget_help"](parent, field),
+		)
+	}
+
+	theme["form_fields"] = func(parent map[string]RenderFunc, args ...any) Node {
+		var items []Node
+
+		for _, item := range args[0].([]*form.Field) {
+			items = append(items, parent["form_row"](parent, item))
+		}
+
+		return Group(items)
+	}
+
+	theme["form_content"] = func(parent map[string]RenderFunc, args ...any) Node {
+		form := args[0].(*form.Form)
+
+		return Group([]Node{
+			parent["form_errors"](parent, form),
+			parent["form_help"](parent, form),
+			parent["form_fields"](parent, form.Fields),
+		})
+	}
+
+	theme["form"] = func(parent map[string]RenderFunc, args ...any) Node {
+		form := args[0].(*form.Form)
+
+		return Form(
+			Class("gf-form"),
+			Action(form.Action),
+			Method(form.Method),
+			parent["form_attributes"](parent, form),
+			parent["form_content"](parent, form),
+		)
+	}
+
+	return theme
+})
diff --git a/theme/renderer.go b/theme/renderer.go
new file mode 100644
index 0000000..d90b7b7
--- /dev/null
+++ b/theme/renderer.go
@@ -0,0 +1,84 @@
+package theme
+
+// @license GNU AGPL version 3 or any later version
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+import (
+	"bytes"
+	"html/template"
+
+	"gitnet.fr/deblan/go-form/form"
+	"maragu.dev/gomponents"
+)
+
+type RenderFunc func(parent map[string]RenderFunc, args ...any) gomponents.Node
+
+type Renderer struct {
+	Theme map[string]RenderFunc
+}
+
+func NewRenderer(theme map[string]RenderFunc) *Renderer {
+	r := new(Renderer)
+	r.Theme = theme
+
+	return r
+}
+
+func toTemplateHtml(n gomponents.Node) template.HTML {
+	var buf bytes.Buffer
+
+	n.Render(&buf)
+
+	return template.HTML(buf.String())
+}
+
+func (r *Renderer) RenderForm(form *form.Form) template.HTML {
+	return toTemplateHtml(r.Theme["form"](r.Theme, form))
+}
+
+func (r *Renderer) FuncMap() template.FuncMap {
+	funcs := template.FuncMap{}
+
+	for _, name := range []string{"form", "form_errors"} {
+		funcs[name] = func(form *form.Form) template.HTML {
+			return toTemplateHtml(r.Theme[name](r.Theme, form))
+		}
+	}
+
+	for _, name := range []string{"form_row", "form_widget", "form_label", "form_widget_errors"} {
+		funcs[name] = func(field *form.Field) template.HTML {
+			return toTemplateHtml(r.Theme[name](r.Theme, field))
+		}
+	}
+
+	return funcs
+}
+
+func (r *Renderer) Render(name, tpl string, args any) template.HTML {
+	t, err := template.New(name).Funcs(r.FuncMap()).Parse(tpl)
+
+	if err != nil {
+		return template.HTML(err.Error())
+	}
+
+	var buf bytes.Buffer
+	err = t.Execute(&buf, args)
+
+	if err != nil {
+		return template.HTML(err.Error())
+	}
+
+	return template.HTML(buf.String())
+}
diff --git a/theme/theme.go b/theme/theme.go
new file mode 100644
index 0000000..9416346
--- /dev/null
+++ b/theme/theme.go
@@ -0,0 +1,21 @@
+package theme
+
+func CreateTheme(generator func() map[string]RenderFunc) map[string]RenderFunc {
+	return generator()
+}
+
+func ExtendTheme(base map[string]RenderFunc, generator func() map[string]RenderFunc) map[string]RenderFunc {
+	extended := CreateTheme(generator)
+
+	for i, v := range base {
+		_, ok := extended[i]
+
+		if ok {
+			extended["base_"+i] = v
+		} else {
+			extended[i] = v
+		}
+	}
+
+	return extended
+}
diff --git a/util/collection.go b/util/collection.go
new file mode 100644
index 0000000..f0aa649
--- /dev/null
+++ b/util/collection.go
@@ -0,0 +1,111 @@
+package util
+
+// @license GNU AGPL version 3 or any later version
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+import (
+	"regexp"
+	"strings"
+
+	"github.com/spf13/cast"
+)
+
+type CollectionValue struct {
+	Name     string
+	Value    string
+	Children map[string]*CollectionValue
+}
+
+type Collection struct {
+	Children map[int]*CollectionValue
+}
+
+func NewCollection() *Collection {
+	return &Collection{
+		Children: make(map[int]*CollectionValue),
+	}
+}
+
+func NewCollectionValue(name string) *CollectionValue {
+	return &CollectionValue{
+		Name:     name,
+		Children: make(map[string]*CollectionValue),
+	}
+}
+
+func (c *Collection) Add(indexes []string, value string) {
+	firstIndex := cast.ToInt(indexes[0])
+	size := len(indexes)
+	child := c.Children[firstIndex]
+
+	if child == nil {
+		child = NewCollectionValue(indexes[0])
+		c.Children[firstIndex] = child
+	}
+
+	child.Add(indexes[1:size], value, nil)
+}
+
+func (c *Collection) Slice() []any {
+	var result []any
+
+	for _, child := range c.Children {
+		result = append(result, child.Map())
+	}
+
+	return result
+}
+
+func (c *CollectionValue) Map() any {
+	if len(c.Children) == 0 {
+		return c.Value
+	}
+
+	results := make(map[string]any)
+
+	for _, child := range c.Children {
+		results[child.Name] = child.Map()
+	}
+
+	return results
+}
+
+func (c *CollectionValue) Add(indexes []string, value string, lastChild *CollectionValue) {
+	size := len(indexes)
+
+	if size > 0 {
+		firstIndex := indexes[0]
+		child := c.Children[firstIndex]
+
+		child = NewCollectionValue(indexes[0])
+		c.Children[firstIndex] = child
+
+		child.Add(indexes[1:size], value, child)
+	} else {
+		lastChild.Value = value
+	}
+}
+
+func ExtractDataIndexes(value string) []string {
+	re := regexp.MustCompile(`\[[^\]]+\]`)
+	items := re.FindAll([]byte(value), -1)
+	var results []string
+
+	for _, i := range items {
+		results = append(results, strings.Trim(string(i), "[]"))
+	}
+
+	return results
+}
diff --git a/util/inspect.go b/util/inspect.go
new file mode 100644
index 0000000..22fa4f4
--- /dev/null
+++ b/util/inspect.go
@@ -0,0 +1,59 @@
+package util
+
+// @license GNU AGPL version 3 or any later version
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+import (
+	"errors"
+	"reflect"
+
+	"github.com/iancoleman/strcase"
+)
+
+func InspectStruct(input interface{}) (map[string]interface{}, error) {
+	val := reflect.ValueOf(input)
+
+	if val.Kind() == reflect.Ptr {
+		val = val.Elem()
+	}
+
+	if val.Kind() == reflect.Map {
+		return input.(map[string]interface{}), nil
+	}
+
+	if val.Kind() != reflect.Struct {
+		return nil, errors.New("Invalid type")
+	}
+
+	result := make(map[string]interface{})
+
+	typ := val.Type()
+	for i := 0; i < val.NumField(); i++ {
+		field := typ.Field(i)
+		value := val.Field(i)
+		tags := typ.Field(i).Tag
+		name := field.Name
+
+		fieldTag := tags.Get("field")
+
+		if fieldTag == "lowerCamel" {
+			name = strcase.ToLowerCamel(name)
+		}
+
+		result[name] = value.Interface()
+	}
+
+	return result, nil
+}
diff --git a/util/transformer.go b/util/transformer.go
new file mode 100644
index 0000000..a942fa1
--- /dev/null
+++ b/util/transformer.go
@@ -0,0 +1,57 @@
+package util
+
+// @license GNU AGPL version 3 or any later version
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+import (
+	"fmt"
+	"net/url"
+)
+
+func MapToUrlValues(values *url.Values, prefix string, data map[string]any) {
+	keyFormater := "%s"
+
+	if prefix != "" {
+		keyFormater = prefix + "[%s]"
+	}
+
+	for key, value := range data {
+		keyValue := fmt.Sprintf(keyFormater, key)
+
+		switch v := value.(type) {
+		case string:
+			values.Add(keyValue, v)
+		case []string:
+		case []int:
+		case []int32:
+		case []int64:
+		case []any:
+			for _, s := range v {
+				values.Add(keyValue, fmt.Sprintf("%v", s))
+			}
+		case bool:
+			if v {
+				values.Add(keyValue, "1")
+			} else {
+				values.Add(keyValue, "0")
+			}
+		case int, int64, float64:
+			values.Add(keyValue, fmt.Sprintf("%v", v))
+		case map[string]any:
+			MapToUrlValues(values, keyValue, v)
+		default:
+		}
+	}
+}
diff --git a/validation/constraint.go b/validation/constraint.go
new file mode 100644
index 0000000..8854921
--- /dev/null
+++ b/validation/constraint.go
@@ -0,0 +1,20 @@
+package validation
+
+// @license GNU AGPL version 3 or any later version
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+type Constraint interface {
+	Validate(data any) []Error
+}
diff --git a/validation/error.go b/validation/error.go
new file mode 100644
index 0000000..f73d341
--- /dev/null
+++ b/validation/error.go
@@ -0,0 +1,18 @@
+package validation
+
+// @license GNU AGPL version 3 or any later version
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+type Error string
diff --git a/validation/iseven.go b/validation/iseven.go
new file mode 100644
index 0000000..306cae2
--- /dev/null
+++ b/validation/iseven.go
@@ -0,0 +1,34 @@
+package validation
+
+import (
+	"strconv"
+)
+
+type IsEven struct {
+	Message          string
+	TypeErrorMessage string
+}
+
+func NewIsEven() IsEven {
+	return IsEven{
+		Message:          "This value is not an even number.",
+		TypeErrorMessage: "This value can not be processed.",
+	}
+}
+
+func (c IsEven) Validate(data any) []Error {
+	errors := []Error{}
+
+	// The constraint should not validate an empty data
+	if len(NewNotBlank().Validate(data)) == 0 {
+		i, err := strconv.Atoi(data.(string))
+
+		if err != nil {
+			errors = append(errors, Error(c.TypeErrorMessage))
+		} else if i%2 != 0 {
+			errors = append(errors, Error(c.Message))
+		}
+	}
+
+	return errors
+}
diff --git a/validation/isodd.go b/validation/isodd.go
new file mode 100644
index 0000000..d7e3b53
--- /dev/null
+++ b/validation/isodd.go
@@ -0,0 +1,34 @@
+package validation
+
+import (
+	"strconv"
+)
+
+type IsOdd struct {
+	Message          string
+	TypeErrorMessage string
+}
+
+func NewIsOdd() IsOdd {
+	return IsOdd{
+		Message:          "This value is not a odd number.",
+		TypeErrorMessage: "This value can not be processed.",
+	}
+}
+
+func (c IsOdd) Validate(data any) []Error {
+	errors := []Error{}
+
+	// The constraint should not validate an empty data
+	if len(NewNotBlank().Validate(data)) == 0 {
+		i, err := strconv.Atoi(data.(string))
+
+		if err != nil {
+			errors = append(errors, Error(c.TypeErrorMessage))
+		} else if i%2 != 1 {
+			errors = append(errors, Error(c.Message))
+		}
+	}
+
+	return errors
+}
diff --git a/validation/length.go b/validation/length.go
new file mode 100644
index 0000000..66d5a1f
--- /dev/null
+++ b/validation/length.go
@@ -0,0 +1,110 @@
+package validation
+
+// @license GNU AGPL version 3 or any later version
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+import (
+	"reflect"
+	"strings"
+
+	"github.com/spf13/cast"
+)
+
+type Length struct {
+	Min              *int
+	Max              *int
+	MinMessage       string
+	MaxMessage       string
+	ExactMessage     string
+	TypeErrorMessage string
+}
+
+func NewLength() Length {
+	return Length{
+		MinMessage:       "This value is too short (min: {{ min }}).",
+		MaxMessage:       "This value is too long (max: {{ max }}).",
+		ExactMessage:     "This value is not valid (expected: {{ min }}).",
+		TypeErrorMessage: "This value can not be processed.",
+	}
+}
+
+func (c Length) WithMin(v int) Length {
+	c.Min = &v
+
+	return c
+}
+
+func (c Length) WithMax(v int) Length {
+	c.Max = &v
+
+	return c
+}
+
+func (c Length) WithExact(v int) Length {
+	c.Min = &v
+	c.Max = &v
+
+	return c
+}
+
+func (c Length) Validate(data any) []Error {
+	if (c.Min == nil && c.Max == nil) || len(NewNotBlank().Validate(data)) != 0 {
+		return []Error{}
+	}
+
+	errors := []Error{}
+
+	t := reflect.TypeOf(data)
+
+	if t.Kind() == reflect.Ptr {
+		t = t.Elem()
+	}
+
+	var size *int
+
+	switch t.Kind() {
+	case reflect.Array:
+	case reflect.Slice:
+		s := reflect.ValueOf(data).Len()
+		size = &s
+	case reflect.String:
+		s := len(data.(string))
+		size = &s
+
+	default:
+		errors = append(errors, Error(c.TypeErrorMessage))
+	}
+
+	if size != nil {
+		if c.Max != nil && c.Min != nil {
+			if *c.Max == *c.Min && *size != *c.Max {
+				errors = append(errors, Error(c.BuildMessage(c.ExactMessage)))
+			}
+		} else if c.Min != nil && *size < *c.Min {
+			errors = append(errors, Error(c.BuildMessage(c.MinMessage)))
+		} else if c.Max != nil && *size > *c.Max {
+			errors = append(errors, Error(c.BuildMessage(c.MaxMessage)))
+		}
+	}
+
+	return errors
+}
+
+func (c *Length) BuildMessage(message string) string {
+	message = strings.ReplaceAll(message, "{{ min }}", cast.ToString(c.Min))
+	message = strings.ReplaceAll(message, "{{ max }}", cast.ToString(c.Max))
+
+	return message
+}
diff --git a/validation/mail.go b/validation/mail.go
new file mode 100644
index 0000000..136ee6d
--- /dev/null
+++ b/validation/mail.go
@@ -0,0 +1,42 @@
+package validation
+
+// @license GNU AGPL version 3 or any later version
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+import "net/mail"
+
+type Mail struct {
+	Message string
+}
+
+func NewMail() Mail {
+	return Mail{
+		Message: "This value is not a valid email address.",
+	}
+}
+
+func (c Mail) Validate(data any) []Error {
+	errors := []Error{}
+
+	if len(NewNotBlank().Validate(data)) == 0 {
+		_, err := mail.ParseAddress(data.(string))
+
+		if err != nil {
+			errors = append(errors, Error(c.Message))
+		}
+	}
+
+	return errors
+}
diff --git a/validation/notblank.go b/validation/notblank.go
new file mode 100644
index 0000000..1962cb2
--- /dev/null
+++ b/validation/notblank.go
@@ -0,0 +1,84 @@
+package validation
+
+// @license GNU AGPL version 3 or any later version
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+import (
+	"reflect"
+
+	"github.com/spf13/cast"
+)
+
+type NotBlank struct {
+	Message          string
+	TypeErrorMessage string
+}
+
+func NewNotBlank() NotBlank {
+	return NotBlank{
+		Message:          "This value should not be blank.",
+		TypeErrorMessage: "This value can not be processed.",
+	}
+}
+
+func (c NotBlank) Validate(data any) []Error {
+	isValid := true
+	errors := []Error{}
+
+	v := reflect.ValueOf(data)
+
+	if data == nil || v.IsZero() {
+		errors = append(errors, Error(c.Message))
+
+		return errors
+	}
+
+	t := reflect.TypeOf(data)
+
+	if t.Kind() == reflect.Ptr {
+		t = t.Elem()
+	}
+
+	switch t.Kind() {
+	case reflect.Bool:
+		isValid = data == false
+	case reflect.Array:
+	case reflect.Slice:
+		isValid = reflect.ValueOf(data).Len() > 0
+	case reflect.String:
+		isValid = len(data.(string)) > 0
+	case reflect.Float32:
+	case reflect.Float64:
+	case reflect.Int:
+	case reflect.Int16:
+	case reflect.Int32:
+	case reflect.Int64:
+	case reflect.Int8:
+	case reflect.Uint:
+	case reflect.Uint16:
+	case reflect.Uint32:
+	case reflect.Uint64:
+	case reflect.Uint8:
+		isValid = cast.ToFloat64(data.(string)) == float64(0)
+	default:
+		errors = append(errors, Error(c.TypeErrorMessage))
+	}
+
+	if !isValid {
+		errors = append(errors, Error(c.Message))
+	}
+
+	return errors
+}
diff --git a/validation/range.go b/validation/range.go
new file mode 100644
index 0000000..ccb95b0
--- /dev/null
+++ b/validation/range.go
@@ -0,0 +1,117 @@
+package validation
+
+// @license GNU AGPL version 3 or any later version
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+import (
+	"reflect"
+	"strings"
+
+	"github.com/spf13/cast"
+)
+
+type Range struct {
+	Min              *float64
+	Max              *float64
+	MinMessage       string
+	MaxMessage       string
+	RangeMessage     string
+	TypeErrorMessage string
+}
+
+func NewRange() Range {
+	return Range{
+		MinMessage:       "This value must be greater than or equal to {{ min }}.",
+		MaxMessage:       "This value must be less than or equal to {{ max }}.",
+		RangeMessage:     "This value should be between {{ min }} and {{ max }}.",
+		TypeErrorMessage: "This value can not be processed.",
+	}
+}
+
+func (c Range) WithMin(v float64) Range {
+	c.Min = &v
+
+	return c
+}
+
+func (c Range) WithMax(v float64) Range {
+	c.Max = &v
+
+	return c
+}
+
+func (c Range) WithRange(vMin, vMax float64) Range {
+	c.Min = &vMin
+	c.Max = &vMax
+
+	return c
+}
+
+func (c Range) Validate(data any) []Error {
+	if c.Min == nil && c.Max == nil || len(NewNotBlank().Validate(data)) != 0 {
+		return []Error{}
+	}
+
+	errors := []Error{}
+
+	t := reflect.TypeOf(data)
+
+	if t.Kind() == reflect.Ptr {
+		t = t.Elem()
+	}
+
+	switch t.Kind() {
+	case reflect.Float32:
+	case reflect.Float64:
+	case reflect.Int:
+	case reflect.Int16:
+	case reflect.Int32:
+	case reflect.Int64:
+	case reflect.Int8:
+	case reflect.Uint:
+	case reflect.Uint16:
+	case reflect.Uint32:
+	case reflect.Uint64:
+	case reflect.Uint8:
+	case reflect.String:
+		isValidMin := c.Min == nil || *c.Min <= cast.ToFloat64(data.(string))
+		isValidMax := c.Max == nil || *c.Max >= cast.ToFloat64(data.(string))
+
+		if !isValidMin || !isValidMax {
+			errors = append(errors, Error(c.BuildMessage()))
+		}
+	default:
+		errors = append(errors, Error(c.TypeErrorMessage))
+	}
+
+	return errors
+}
+
+func (c *Range) BuildMessage() string {
+	var message string
+
+	if c.Min != nil && c.Max == nil {
+		message = c.MinMessage
+	} else if c.Max != nil && c.Min == nil {
+		message = c.MaxMessage
+	} else {
+		message = c.RangeMessage
+	}
+
+	message = strings.ReplaceAll(message, "{{ min }}", cast.ToString(c.Min))
+	message = strings.ReplaceAll(message, "{{ max }}", cast.ToString(c.Max))
+
+	return message
+}
diff --git a/validation/regex.go b/validation/regex.go
new file mode 100644
index 0000000..28815b1
--- /dev/null
+++ b/validation/regex.go
@@ -0,0 +1,75 @@
+package validation
+
+// @license GNU AGPL version 3 or any later version
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+import (
+	"reflect"
+	"regexp"
+)
+
+type Regex struct {
+	Message          string
+	TypeErrorMessage string
+	Match            bool
+	Expression       string
+}
+
+func NewRegex(expr string) Regex {
+	return Regex{
+		Message:          "This value is not valid.",
+		TypeErrorMessage: "This value can not be processed.",
+		Match:            true,
+		Expression:       expr,
+	}
+}
+
+func (c Regex) MustMatch() Regex {
+	c.Match = true
+
+	return c
+}
+
+func (c Regex) MustNotMatch() Regex {
+	c.Match = false
+
+	return c
+}
+
+func (c Regex) Validate(data any) []Error {
+	errors := []Error{}
+
+	if len(NewNotBlank().Validate(data)) == 0 {
+		t := reflect.TypeOf(data)
+
+		if t.Kind() == reflect.Ptr {
+			t = t.Elem()
+		}
+
+		switch t.Kind() {
+		case reflect.String:
+			matched, _ := regexp.MatchString(c.Expression, data.(string))
+
+			if !matched && c.Match || matched && !c.Match {
+				errors = append(errors, Error(c.Message))
+			}
+
+		default:
+			errors = append(errors, Error(c.TypeErrorMessage))
+		}
+	}
+
+	return errors
+}
diff --git a/validation/validation.go b/validation/validation.go
new file mode 100644
index 0000000..97dfd17
--- /dev/null
+++ b/validation/validation.go
@@ -0,0 +1,28 @@
+package validation
+
+// @license GNU AGPL version 3 or any later version
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+func Validate(data any, constraints []Constraint) (bool, []Error) {
+	errs := []Error{}
+
+	for _, constraint := range constraints {
+		for _, e := range constraint.Validate(data) {
+			errs = append(errs, e)
+		}
+	}
+
+	return len(errs) == 0, errs
+}