diff --git a/CHANGELOG.md b/CHANGELOG.md
index f207094..1629054 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 ## [Unreleased]
 
+### Added
+
+- feat: add tag `field` to specify the naming strategy (case)
+
 ## v1.1.6
 
 ### Fixed
diff --git a/go.mod b/go.mod
index 0b43ae4..3973949 100644
--- a/go.mod
+++ b/go.mod
@@ -9,6 +9,7 @@ require (
 )
 
 require (
+	github.com/iancoleman/strcase v0.3.0 // indirect
 	github.com/samber/lo v1.51.0 // indirect
 	golang.org/x/text v0.22.0 // indirect
 	maragu.dev/gomponents v1.1.0 // indirect
diff --git a/go.sum b/go.sum
index fd3f0f9..f6698b1 100644
--- a/go.sum
+++ b/go.sum
@@ -2,6 +2,8 @@ github.com/frankban/quicktest v1.14.6 h1:7Xjx+VpznH+oBnejlPUj8oUpdxnVs4f8XU8WnHk
 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=
diff --git a/util/inspect.go b/util/inspect.go
index 76c8e9f..17c0839 100644
--- a/util/inspect.go
+++ b/util/inspect.go
@@ -18,6 +18,8 @@ package util
 import (
 	"errors"
 	"reflect"
+
+	"github.com/iancoleman/strcase"
 )
 
 func InspectStruct(input interface{}) (map[string]interface{}, error) {
@@ -37,8 +39,16 @@ func InspectStruct(input interface{}) (map[string]interface{}, error) {
 	for i := 0; i < val.NumField(); i++ {
 		field := typ.Field(i)
 		value := val.Field(i)
+		tags := typ.Field(i).Tag
+		name := field.Name
 
-		result[field.Name] = value.Interface()
+		fieldTag := tags.Get("field")
+
+		if fieldTag == "lowerCamel" {
+			name = strcase.ToLowerCamel(name)
+		}
+
+		result[name] = value.Interface()
 	}
 
 	return result, nil
diff --git a/validation/notblank.go b/validation/notblank.go
index a417e22..1962cb2 100644
--- a/validation/notblank.go
+++ b/validation/notblank.go
@@ -39,7 +39,7 @@ func (c NotBlank) Validate(data any) []Error {
 
 	v := reflect.ValueOf(data)
 
-	if v.IsZero() {
+	if data == nil || v.IsZero() {
 		errors = append(errors, Error(c.Message))
 
 		return errors