Update app.py

app.py

@@ -86,7 +86,10 @@ def convert_image():
         base64_string = data['file']
         if base64_string.startswith('data:image'):
             base64_string = base64_string.split(',')[1]
-        image_data = base64.b64decode(base64_string)
+        try:
+            image_data = base64.b64decode(base64_string)
+        except Exception as e:
+            return jsonify({'error': 'Invalid base64 image data'}), 400
         image = Image.open(io.BytesIO(image_data)).convert('RGB')
 
         # Get parameters (with defaults)