diff --git a/frontend/src/components/gallery/UserPhotoUpload.tsx b/frontend/src/components/gallery/UserPhotoUpload.tsx
index 0f4ffef9..4d57f787 100644
--- a/frontend/src/components/gallery/UserPhotoUpload.tsx
+++ b/frontend/src/components/gallery/UserPhotoUpload.tsx
@@ -5,7 +5,7 @@ import { toast } from 'react-toastify';
 import { Button } from '../common';
 import { api } from '../../config/api';
 import { usePublicSettings } from '../../hooks/usePublicSettings';
-import { extensionsToMimeTypes, extensionsToAcceptString } from '../../utils/fileTypes';
+import { extensionsToMimeTypes, extensionsToAcceptString, getSupportedExtensions } from '../../utils/fileTypes';
 
 interface UserPhotoUploadProps {
   eventId: number;
@@ -61,6 +61,11 @@ export const UserPhotoUpload: React.FC<UserPhotoUploadProps> = ({
     [publicSettings?.allowed_file_types]
   );
 
+  const allowedExtensions = useMemo(
+    () => getSupportedExtensions(publicSettings?.allowed_file_types),
+    [publicSettings?.allowed_file_types]
+  );
+
   // Shared filter pipeline for both <input> change and drag-and-drop (#504).
   const addFiles = (incoming: File[]) => {
     const validFiles = incoming.filter((file) => {
@@ -233,10 +238,11 @@ export const UserPhotoUpload: React.FC<UserPhotoUploadProps> = ({
                     {t('upload.clickToUpload')}
                   </p>
                   <p className="text-xs text-muted-theme">
-                    {/* #613 — pass { limit } so `{{limit}}` interpolates
-                        with the real number from settings instead of
-                        rendering literally. */}
-                    {t('upload.fileRequirements', { limit: maxFilesPerUpload, sizeLimit: maxFileSizeMb })}
+                    {t('upload.fileRequirements', {
+                      types: allowedExtensions.map(extension => extension.toUpperCase()).join(', '),
+                      limit: maxFilesPerUpload,
+                      sizeLimit: maxFileSizeMb,
+                    })}
                   </p>
                   <input
                     type="file"
diff --git a/frontend/src/i18n/locales/de.json b/frontend/src/i18n/locales/de.json
index b128f2b5..d8685cfd 100644
--- a/frontend/src/i18n/locales/de.json
+++ b/frontend/src/i18n/locales/de.json
@@ -159,7 +159,7 @@
     "noCategory": "Keine Kategorie",
     "eventSpecific": "(Veranstaltungsspezifisch)",
     "clickToUpload": "Klicken zum Hochladen oder per Drag & Drop",
-    "fileRequirements": "JPEG, PNG oder WebP (max. {{sizeLimit}}MB pro Datei, {{limit}} Dateien pro Upload)",
+    "fileRequirements": "{{types}} (max. {{sizeLimit}}MB pro Datei, {{limit}} Dateien pro Upload)",
     "selectedFiles": "Ausgewählte Dateien",
     "uploading": "Wird hochgeladen...",
     "transferring": "Übertragung",
diff --git a/frontend/src/i18n/locales/en.json b/frontend/src/i18n/locales/en.json
index 993129a9..9166eb92 100644
--- a/frontend/src/i18n/locales/en.json
+++ b/frontend/src/i18n/locales/en.json
@@ -159,7 +159,7 @@
     "noCategory": "No category",
     "eventSpecific": "(Event specific)",
     "clickToUpload": "Click to upload or drag and drop",
-    "fileRequirements": "JPEG, PNG or WebP (max {{sizeLimit}}MB per file, {{limit}} files per upload)",
+    "fileRequirements": "{{types}} (max {{sizeLimit}}MB per file, {{limit}} files per upload)",
     "selectedFiles": "Selected files",
     "uploading": "Uploading...",
     "transferring": "Transferring",
diff --git a/frontend/src/i18n/locales/es.json b/frontend/src/i18n/locales/es.json
index 8f4d0958..f3212730 100644
--- a/frontend/src/i18n/locales/es.json
+++ b/frontend/src/i18n/locales/es.json
@@ -126,7 +126,7 @@
     "noCategory": "Sin categoría",
     "eventSpecific": "(Específico del evento)",
     "clickToUpload": "Haz clic para subir o arrastra y suelta",
-    "fileRequirements": "JPEG, PNG o WebP (máx. {{sizeLimit}}MB por archivo, {{limit}} archivos por subida)",
+    "fileRequirements": "{{types}} (máx. {{sizeLimit}}MB por archivo, {{limit}} archivos por subida)",
     "fileRequirementsMedia": "Imágenes JPEG, PNG o WebP y videos MP4/MOV/WEBM (máx. 50MB por archivo, {{limit}} archivos por subida)",
     "unsupportedFiles": "Algunos archivos se omitieron porque el formato no es compatible (usa JPEG/PNG/WebP/MP4/MOV/WEBM).",
     "selectedFiles": "Archivos seleccionados",
diff --git a/frontend/src/i18n/locales/fr.json b/frontend/src/i18n/locales/fr.json
index 9e167037..3eb34068 100644
--- a/frontend/src/i18n/locales/fr.json
+++ b/frontend/src/i18n/locales/fr.json
@@ -131,7 +131,7 @@
     "noCategory": "Aucune catégorie",
     "eventSpecific": "(Spécifique à l'événement)",
     "clickToUpload": "Cliquez pour téléverser ou glissez-déposez",
-    "fileRequirements": "JPEG, PNG ou WebP (max {{sizeLimit}} Mo par fichier, {{limit}} fichiers par téléversement)",
+    "fileRequirements": "{{types}} (max {{sizeLimit}} Mo par fichier, {{limit}} fichiers par téléversement)",
     "selectedFiles": "Fichiers sélectionnés",
     "uploading": "Téléversement en cours...",
     "transferring": "Transfert en cours",
diff --git a/frontend/src/i18n/locales/nl.json b/frontend/src/i18n/locales/nl.json
index cd9e386e..19111639 100644
--- a/frontend/src/i18n/locales/nl.json
+++ b/frontend/src/i18n/locales/nl.json
@@ -131,7 +131,7 @@
     "noCategory": "Geen categorie",
     "eventSpecific": "(Evenement-specifiek)",
     "clickToUpload": "Klik om te uploaden of sleep bestanden hierheen",
-    "fileRequirements": "JPEG, PNG of WebP (max. {{sizeLimit}} MB per bestand, {{limit}} bestanden per upload)",
+    "fileRequirements": "{{types}} (max. {{sizeLimit}} MB per bestand, {{limit}} bestanden per upload)",
     "selectedFiles": "Geselecteerde bestanden",
     "uploading": "Uploaden...",
     "uploadComplete": "Upload voltooid!",
diff --git a/frontend/src/i18n/locales/pt.json b/frontend/src/i18n/locales/pt.json
index 6fea3077..a9a37e26 100644
--- a/frontend/src/i18n/locales/pt.json
+++ b/frontend/src/i18n/locales/pt.json
@@ -131,7 +131,7 @@
     "noCategory": "Sem categoria",
     "eventSpecific": "(Específico do evento)",
     "clickToUpload": "Clique para enviar ou arraste e solte",
-    "fileRequirements": "JPEG, PNG ou WebP (máx. {{sizeLimit}}MB por arquivo, {{limit}} arquivos por envio)",
+    "fileRequirements": "{{types}} (máx. {{sizeLimit}}MB por arquivo, {{limit}} arquivos por envio)",
     "selectedFiles": "Arquivos selecionados",
     "uploading": "Enviando...",
     "uploadComplete": "Envio concluído!",
diff --git a/frontend/src/i18n/locales/ru.json b/frontend/src/i18n/locales/ru.json
index 54d36e6f..3c163d5e 100644
--- a/frontend/src/i18n/locales/ru.json
+++ b/frontend/src/i18n/locales/ru.json
@@ -131,7 +131,7 @@
     "noCategory": "Без категории",
     "eventSpecific": "(Для конкретного события)",
     "clickToUpload": "Нажмите для загрузки или перетащите файлы",
-    "fileRequirements": "JPEG, PNG или WebP (макс. {{sizeLimit}} МБ на файл, {{limit}} файлов за загрузку)",
+    "fileRequirements": "{{types}} (макс. {{sizeLimit}} МБ на файл, {{limit}} файлов за загрузку)",
     "selectedFiles": "Выбранные файлы",
     "uploading": "Загрузка...",
     "uploadComplete": "Загрузка завершена!",
diff --git a/frontend/src/i18n/locales/sl.json b/frontend/src/i18n/locales/sl.json
index 3d3f1ff0..dfbadad8 100644
--- a/frontend/src/i18n/locales/sl.json
+++ b/frontend/src/i18n/locales/sl.json
@@ -131,7 +131,7 @@
     "noCategory": "Brez kategorije",
     "eventSpecific": "(specifično za dogodek)",
     "clickToUpload": "Kliknite za nalaganje ali povlecite in spustite",
-    "fileRequirements": "JPEG, PNG ali WebP (največ {{sizeLimit}} MB na datoteko, {{limit}} datotek na nalaganje)",
+    "fileRequirements": "{{types}} (največ {{sizeLimit}} MB na datoteko, {{limit}} datotek na nalaganje)",
     "selectedFiles": "Izbrane datoteke",
     "uploading": "Nalaganje...",
     "transferring": "Prenašanje",
diff --git a/frontend/src/services/publicSettings.service.ts b/frontend/src/services/publicSettings.service.ts
index 1ce62b08..1ee3bab0 100644
--- a/frontend/src/services/publicSettings.service.ts
+++ b/frontend/src/services/publicSettings.service.ts
@@ -82,6 +82,8 @@ export interface PublicSettings {
   // modal can render the real number in `upload.fileRequirements` and refuse
   // oversized batches client-side. Backend enforces the same value too.
   general_max_files_per_upload?: number;
+  // Per-file size limit surfaced for the guest upload guard and requirements hint.
+  general_max_file_size_mb?: number;
   // Event field requirements
   event_require_customer_name?: boolean;
   event_require_customer_email?: boolean;
diff --git a/frontend/src/utils/__tests__/fileTypes.test.ts b/frontend/src/utils/__tests__/fileTypes.test.ts
new file mode 100644
index 00000000..e54ff4f1
--- /dev/null
+++ b/frontend/src/utils/__tests__/fileTypes.test.ts
@@ -0,0 +1,37 @@
+import { describe, expect, it } from 'vitest';
+import {
+  extensionsToAcceptString,
+  extensionsToMimeTypes,
+  getSupportedExtensions,
+} from '../fileTypes';
+
+describe('file type settings', () => {
+  it('keeps configured supported extensions for the upload hint', () => {
+    expect(getSupportedExtensions('jpg, mov, mp4, .webp')).toEqual([
+      'jpg',
+      'mov',
+      'mp4',
+      'webp',
+    ]);
+  });
+
+  it('uses the same configured types for validation and file selection', () => {
+    expect(extensionsToMimeTypes('jpg,jpeg,mov,mp4')).toEqual([
+      'image/jpeg',
+      'video/quicktime',
+      'video/mp4',
+    ]);
+    expect(extensionsToAcceptString('jpg,jpeg,mov,mp4')).toBe(
+      'image/jpeg,video/quicktime,video/mp4'
+    );
+  });
+
+  it('falls back to the default formats when no configured types are supported', () => {
+    expect(getSupportedExtensions('dng,unknown')).toEqual([
+      'jpg',
+      'jpeg',
+      'png',
+      'webp',
+    ]);
+  });
+});
diff --git a/frontend/src/utils/fileTypes.ts b/frontend/src/utils/fileTypes.ts
index ba5514c9..46091dd8 100644
--- a/frontend/src/utils/fileTypes.ts
+++ b/frontend/src/utils/fileTypes.ts
@@ -16,27 +16,30 @@ const EXTENSION_TO_MIME: Record<string, string> = {
 
 const DEFAULT_ALLOWED = 'jpg,jpeg,png,webp';
 
+/**
+ * Return the configured supported extensions, excluding values the upload
+ * pipeline cannot validate. Falls back to the default list when none match.
+ */
+export function getSupportedExtensions(extString?: string | null): string[] {
+  const input = extString?.trim() || DEFAULT_ALLOWED;
+  const extensions = input
+    .split(',')
+    .map(ext => ext.trim().toLowerCase().replace(/^\./, ''))
+    .filter(ext => Boolean(EXTENSION_TO_MIME[ext]));
+
+  return extensions.length > 0
+    ? Array.from(new Set(extensions))
+    : getSupportedExtensions(DEFAULT_ALLOWED);
+}
+
 /**
  * Convert a comma-separated extension string (e.g. "jpg,png,mp4") to an
  * array of unique MIME types.
  */
 export function extensionsToMimeTypes(extString?: string | null): string[] {
-  const input = extString?.trim() || DEFAULT_ALLOWED;
-  const mimeSet = new Set<string>();
-
-  input.split(',').forEach(ext => {
-    const cleaned = ext.trim().toLowerCase().replace(/^\./, '');
-    const mime = EXTENSION_TO_MIME[cleaned];
-    if (mime) {
-      mimeSet.add(mime);
-    }
-  });
-
-  if (mimeSet.size === 0) {
-    return extensionsToMimeTypes(DEFAULT_ALLOWED);
-  }
-
-  return Array.from(mimeSet);
+  return Array.from(new Set(
+    getSupportedExtensions(extString).map(extension => EXTENSION_TO_MIME[extension])
+  ));
 }
 
 /**