diff --git a/core/String/FileInformationBuilder.php b/core/String/FileInformationBuilder.php
new file mode 100644
index 0000000..9f3aab6
--- /dev/null
+++ b/core/String/FileInformationBuilder.php
@@ -0,0 +1,61 @@
+<?php
+
+namespace App\Core\String;
+
+use App\Core\FileManager\FsFileManager;
+use App\Core\Repository\FileInformationRepositoryQuery;
+
+/**
+ * class FileInformationBuilder.
+ *
+ * @author Simon Vieille <simon@deblan.fr>
+ */
+class FileInformationBuilder
+{
+    protected FsFileManager $fsManager;
+    protected FileInformationRepositoryQuery $query;
+
+    public function __construct(FsFileManager $fsManager, FileInformationRepositoryQuery $query)
+    {
+        $this->fsManager = $fsManager;
+        $this->query = $query;
+    }
+
+    public function replaceTags(string $value)
+    {
+        preg_match_all(
+            '#\{\{\s*fattr://(?P<hash>[a-z0-9]+)\/(?P<label>.+)\s*\}\}#isU',
+            $value,
+            $match,
+            PREG_SET_ORDER
+        );
+
+        $fileInfos = [];
+
+        foreach ($match as $block) {
+            $hash = $block['hash'];
+            $label = $block['label'];
+            $tagValue = null;
+
+            if (!isset($fileInfos[$hash])) {
+                $fileInfos[$hash] = $this->query->create()
+                    ->where('.id LIKE :hash')
+                    ->setParameter(':hash', $hash.'%')
+                    ->findOne()
+                ;
+            }
+
+            if ($fileInfos[$hash]) {
+                foreach ($fileInfos[$hash]->getAttributes() as $attribute) {
+                    if ($attribute['label'] === $label) {
+                        $tagValue = htmlspecialchars($attribute['value'], ENT_HTML5 | ENT_QUOTES);
+                    }
+                }
+            }
+
+            $value = str_replace($block[0], $tagValue, $value);
+        }
+
+        return $value;
+    }
+}
diff --git a/core/String/UrlBuilder.php b/core/String/UrlBuilder.php
new file mode 100644
index 0000000..759f187
--- /dev/null
+++ b/core/String/UrlBuilder.php
@@ -0,0 +1,65 @@
+<?php
+
+namespace App\Core\String;
+
+use App\Core\Site\SiteRequest;
+use Symfony\Component\Routing\Generator\UrlGeneratorInterface;
+
+/**
+ * class UrlBuilder.
+ *
+ * @author Simon Vieille <simon@deblan.fr>
+ */
+class UrlBuilder
+{
+    protected UrlGeneratorInterface $urlGenerator;
+    protected SiteRequest $siteRequest;
+
+    public function __construct(UrlGeneratorInterface $urlGenerator, SiteRequest $siteRequest)
+    {
+        $this->urlGenerator = $urlGenerator;
+        $this->siteRequest = $siteRequest;
+    }
+
+    public function replaceTags(string $value): string
+    {
+        preg_match_all(
+            '#\{\{\s*url://(?P<route>[a-z0-9_]+)(\?(?P<params>.*))?\s*\}\}#isU',
+            $value,
+            $match,
+            PREG_SET_ORDER
+        );
+
+        $domain = $this->siteRequest->getDomain();
+
+        foreach ($match as $block) {
+            $url = null;
+
+            try {
+                $block['params'] = $block['params'] ?? '';
+                $block['params'] = str_replace(['&amp;', ' '], ['&', '%20'], $block['params']);
+                $route = $block['route'];
+                parse_str($block['params'], $params);
+
+                if (!isset($params['_domain'])) {
+                    $params['_domain'] = $domain;
+                }
+
+                $url = $this->urlGenerator->generate($route, $params, UrlGeneratorInterface::ABSOLUTE_URL);
+
+                parse_str(parse_url($url)['query'] ?? '', $infos);
+
+                if (isset($infos['_domain'])) {
+                    unset($params['_domain']);
+
+                    $url = $this->urlGenerator->generate($route, $params, UrlGeneratorInterface::ABSOLUTE_URL);
+                }
+            } catch (\Exception $e) {
+            }
+
+            $value = str_replace($block[0], $url, $value);
+        }
+
+        return $value;
+    }
+}
diff --git a/core/Twig/Extension/FileInformationExtension.php b/core/Twig/Extension/FileInformationExtension.php
index 876290a..31eb989 100644
--- a/core/Twig/Extension/FileInformationExtension.php
+++ b/core/Twig/Extension/FileInformationExtension.php
@@ -7,14 +7,19 @@ use App\Core\Repository\FileInformationRepositoryQuery;
 use function Symfony\Component\String\u;
 use Twig\Extension\AbstractExtension;
 use Twig\TwigFilter;
+use App\Core\String\FileInformationBuilder;
 
 class FileInformationExtension extends AbstractExtension
 {
-    protected FsFileManager $fsManage²r;
-    protected FileInformationRepositoryQuery $query;
+    protected FileInformationBuilder $fileInfoBuilder;
 
-    public function __construct(FsFileManager $fsManager, FileInformationRepositoryQuery $query)
+    public function __construct(
+        FileInformationBuilder $fileInfoBuilder,
+        FsFileManager $fsManager,
+        FileInformationRepositoryQuery $query
+    )
     {
+        $this->fileInfoBuilder = $fileInfoBuilder;
         $this->fsManager = $fsManager;
         $this->query = $query;
     }
@@ -54,32 +59,8 @@ class FileInformationExtension extends AbstractExtension
         return null;
     }
 
-    public function fileAttributes(?string $content): ?string
+    public function fileAttributes(?string $content): string
     {
-        preg_match_all('#\{\{\s*fattr://(?P<hash>[a-z0-9]+)\/(?P<label>.+)\s*\}\}#isU', $content, $match, PREG_SET_ORDER);
-
-        foreach ($match as $block) {
-            $hash = $block['hash'];
-            $label = $block['label'];
-            $value = null;
-
-            $fileInfo = $this->query->create()
-                ->where('.id LIKE :hash')
-                ->setParameter(':hash', $hash.'%')
-                ->findOne()
-            ;
-
-            if ($fileInfo) {
-                foreach ($fileInfo->getAttributes() as $attribute) {
-                    if ($attribute['label'] === $label) {
-                        $value = htmlspecialchars($attribute['value'], ENT_HTML5 | ENT_QUOTES);
-                    }
-                }
-            }
-
-            $content = str_replace($block[0], $value, $content);
-        }
-
-        return $content;
+        return $this->fileInfoBuilder->replaceTags((string) $content);
     }
 }
diff --git a/core/Twig/Extension/UrlExtension.php b/core/Twig/Extension/UrlExtension.php
index e0f68a1..f541d2f 100644
--- a/core/Twig/Extension/UrlExtension.php
+++ b/core/Twig/Extension/UrlExtension.php
@@ -6,16 +6,15 @@ use App\Core\Site\SiteRequest;
 use Symfony\Component\Routing\Generator\UrlGeneratorInterface;
 use Twig\Extension\AbstractExtension;
 use Twig\TwigFilter;
+use App\Core\String\UrlBuilder;
 
 class UrlExtension extends AbstractExtension
 {
-    protected UrlGeneratorInterface $urlGenerator;
-    protected SiteRequest $siteRequest;
+    protected UrlBuilder $urlBuilder;
 
-    public function __construct(UrlGeneratorInterface $urlGenerator, SiteRequest $siteRequest)
+    public function __construct(UrlBuilder $urlBuilder)
     {
-        $this->urlGenerator = $urlGenerator;
-        $this->siteRequest = $siteRequest;
+        $this->urlBuilder = $urlBuilder;
     }
 
     /**
@@ -30,36 +29,6 @@ class UrlExtension extends AbstractExtension
 
     public function replaceUrl(?string $content)
     {
-        preg_match_all('#\{\{\s*url://(?P<route>[a-z0-9_]+)(\?(?P<params>.*))?\s*\}\}#isU', $content, $match, PREG_SET_ORDER);
-
-        foreach ($match as $block) {
-            $url = null;
-
-            try {
-                $block['params'] = $block['params'] ?? '';
-                $block['params'] = str_replace(['&amp;', ' '], ['&', '%20'], $block['params']);
-                $route = $block['route'];
-                parse_str($block['params'], $params);
-
-                if (!isset($params['_domain'])) {
-                    $params['_domain'] = $this->siteRequest->getDomain();
-                }
-
-                $url = $this->urlGenerator->generate($route, $params, UrlGeneratorInterface::ABSOLUTE_URL);
-
-                parse_str(parse_url($url)['query'] ?? '', $infos);
-
-                if (isset($infos['_domain'])) {
-                    unset($params['_domain']);
-
-                    $url = $this->urlGenerator->generate($route, $params, UrlGeneratorInterface::ABSOLUTE_URL);
-                }
-            } catch (\Exception $e) {
-            }
-
-            $content = str_replace($block[0], $url, $content);
-        }
-
-        return $content;
+        return $this->urlBuilder->replaceTags((string) $content);
     }
 }