diff --git a/src/lib/Form/Type/FieldType/ImageAssetFieldType.php b/src/lib/Form/Type/FieldType/ImageAssetFieldType.php
index 40ff8c21..0fc17965 100644
--- a/src/lib/Form/Type/FieldType/ImageAssetFieldType.php
+++ b/src/lib/Form/Type/FieldType/ImageAssetFieldType.php
@@ -22,6 +22,7 @@
 use Symfony\Component\Form\FormBuilderInterface;
 use Symfony\Component\Form\FormInterface;
 use Symfony\Component\Form\FormView;
+use Symfony\Component\Mime\MimeTypesInterface;
 use Symfony\Component\OptionsResolver\OptionsResolver;
 use Symfony\Component\Validator\Constraints as Assert;
 
@@ -36,16 +37,18 @@ class ImageAssetFieldType extends AbstractType
     /** @var \Ibexa\ContentForms\ConfigResolver\MaxUploadSize */
     private $maxUploadSize;
 
-    /**
-     * @param \Ibexa\Contracts\Core\Repository\ContentService $contentService
-     * @param \Ibexa\Core\FieldType\ImageAsset\AssetMapper $mapper
-     * @param \Ibexa\ContentForms\ConfigResolver\MaxUploadSize $maxUploadSize
-     */
-    public function __construct(ContentService $contentService, AssetMapper $mapper, MaxUploadSize $maxUploadSize)
-    {
+    private MimeTypesInterface $mimeTypes;
+
+    public function __construct(
+        ContentService $contentService,
+        AssetMapper $mapper,
+        MaxUploadSize $maxUploadSize,
+        MimeTypesInterface $mimeTypes
+    ) {
         $this->contentService = $contentService;
         $this->maxUploadSize = $maxUploadSize;
         $this->assetMapper = $mapper;
+        $this->mimeTypes = $mimeTypes;
     }
 
     public function getName()
@@ -116,6 +119,7 @@ public function buildView(FormView $view, FormInterface $form, array $options)
 
         if (!empty($mimeTypes)) {
             $view->vars['mime_types'] = $mimeTypes;
+            $view->vars['image_extensions'] = $this->getMimeTypesExtensions($mimeTypes);
         }
 
         $view->vars['max_file_size'] = $this->getMaxFileSize();
@@ -144,6 +148,21 @@ private function getMaxFileSize(): float
 
         return (float)$this->maxUploadSize->get();
     }
+
+    /**
+     * @param array<string> $mimeTypes
+     *
+     * @return array<string, array<string>>
+     */
+    private function getMimeTypesExtensions(array $mimeTypes): array
+    {
+        $extensions = [];
+        foreach ($mimeTypes as $mimeType) {
+            $extensions[$mimeType] = $this->mimeTypes->getExtensions($mimeType);
+        }
+
+        return $extensions;
+    }
 }
 
 class_alias(ImageAssetFieldType::class, 'EzSystems\EzPlatformContentForms\Form\Type\FieldType\ImageAssetFieldType');
diff --git a/src/lib/Form/Type/FieldType/ImageFieldType.php b/src/lib/Form/Type/FieldType/ImageFieldType.php
index 82e7df0a..9f0c25ab 100644
--- a/src/lib/Form/Type/FieldType/ImageFieldType.php
+++ b/src/lib/Form/Type/FieldType/ImageFieldType.php
@@ -15,6 +15,7 @@
 use Symfony\Component\Form\FormBuilderInterface;
 use Symfony\Component\Form\FormInterface;
 use Symfony\Component\Form\FormView;
+use Symfony\Component\Mime\MimeTypesInterface;
 use Symfony\Component\OptionsResolver\OptionsResolver;
 
 /**
@@ -22,6 +23,13 @@
  */
 class ImageFieldType extends AbstractType
 {
+    private MimeTypesInterface $mimeTypes;
+
+    public function __construct(MimeTypesInterface $mimeTypes)
+    {
+        $this->mimeTypes = $mimeTypes;
+    }
+
     public function getName()
     {
         return $this->getBlockPrefix();
@@ -59,6 +67,7 @@ public function buildView(FormView $view, FormInterface $form, array $options)
         $view->vars += [
             'is_alternative_text_required' => $options['is_alternative_text_required'],
             'mime_types' => $options['mime_types'],
+            'image_extensions' => $this->getMimeTypesExtensions($options['mime_types']),
         ];
     }
 
@@ -68,10 +77,27 @@ public function configureOptions(OptionsResolver $resolver)
             'translation_domain' => 'ibexa_content_forms_fieldtype',
             'is_alternative_text_required' => false,
             'mime_types' => [],
+            'image_extensions' => [],
         ]);
 
         $resolver->setAllowedTypes('is_alternative_text_required', 'bool');
         $resolver->setAllowedTypes('mime_types', ['array']);
+        $resolver->setAllowedTypes('image_extensions', ['array']);
+    }
+
+    /**
+     * @param array<string> $mimeTypes
+     *
+     * @return array<string, array<string>>
+     */
+    private function getMimeTypesExtensions(array $mimeTypes): array
+    {
+        $extensions = [];
+        foreach ($mimeTypes as $mimeType) {
+            $extensions[$mimeType] = $this->mimeTypes->getExtensions($mimeType);
+        }
+
+        return $extensions;
     }
 }