diff --git a/data/www/index.html b/data/www/index.html
index f5c43b7..c606064 100644
--- a/data/www/index.html
+++ b/data/www/index.html
@@ -25,6 +25,7 @@
     <form class="w3-margin w3-center w3-card w3-padding-24" action="/upload" method="POST" enctype="multipart/form-data">
         <input type="file" accept=".mp3,.wav" name="file">
         <input type="submit" class="w3-button w3-blue">
+        <p class="w3-opacity">Types de fichiers acceptés : mp3 et wav. Utilisez <a target="_blank" href="https://cloudconvert.com/mp3-converter">CloudConvert</a> si besoin.</p>
     </form>
 
     <div class="w3-margin w3-center w3-card w3-padding-24">