diff --git a/README.md b/README.md
index 417da96..b691311 100644
--- a/README.md
+++ b/README.md
@@ -27,6 +27,7 @@ Then, run the Contao install tool to update the database.
 - [DcaRelations](docs/DcaRelations.md)
 - [DoctrineOrm](docs/DoctrineOrm.md)
 - [Form](docs/Form.md)
+- [FileUploadNormalizer](docs/FileUploadNormalizer.md)
 - [Formatter](docs/Formatter.md)
 - [StringParser](docs/StringParser.md)
 - [Undo](docs/Undo.md)
diff --git a/docs/FileUploadNormalizer.md b/docs/FileUploadNormalizer.md
new file mode 100644
index 0000000..be160ea
--- /dev/null
+++ b/docs/FileUploadNormalizer.md
@@ -0,0 +1,35 @@
+# FileUploadNormalizer
+
+The problem the `FileUploadNormalizer` tries to tackle is that Contao's file uploads in the form generator (`Form.php`) 
+accesses file uploads from the widget itself and there is no defined API. The built-in upload form field generates a
+typical PHP upload array. Some form field widgets return a Contao Dbafs UUID, others just a file path and some even
+return multiple values. It's a mess.
+
+It is designed to be used with the `processFormData` hook specifically.
+
+## Usage
+
+```php
+
+use Codefog\HasteBundle\FileUploadNormalizer;
+use Contao\CoreBundle\DependencyInjection\Attribute\AsHook;
+use Contao\Form;
+use Contao\Widget;
+
+#[AsHook('prepareFormData')]
+class PrepareFomDataListener
+{
+    public function __construct(private readonly FileUploadNormalizer $fileUploadNormalizer)
+    {
+    }
+
+    /**
+     * @param array<Widget> $fields
+     */
+    public function __invoke(array &$submitted, array $labels, array $fields, Form $form, array $files): void
+    {
+        // You now have an array of normalized files.
+        $normalizedFiles = $this->fileUploadNormalizer->normalize($files);
+    }
+}
+```