diff --git a/waifuc/source/web.py b/waifuc/source/web.py
index 76ccbc3a..a257e1b2 100644
--- a/waifuc/source/web.py
+++ b/waifuc/source/web.py
@@ -27,6 +27,7 @@ def __init__(self, group_name: str, session: httpx.Client = None, download_silen
         self.download_silent = download_silent
         self.session = session or get_requests_session()
         self.group_name = group_name
+        self.file_ext_filter = None # not filter file extension as default
 
     @classmethod
     def _rate_limiter(cls) -> Limiter:
@@ -57,7 +58,14 @@ def _iter(self) -> Iterator[ImageItem]:
                     _, ext_name = os.path.splitext(urlsplit(url).filename)
                     filename = f'{self.group_name}_{id_}{ext_name}'
                     td_file = os.path.join(td, filename)
-
+                    if self.file_ext_filter:
+                        file_ext=filename.split(".")[-1]
+                        if any(x.replace(".","").lower() in file_ext.lower() for x in self.file_ext_filter):
+                            pass # only want the extension i want
+                        else:
+                            warnings.warn(f'Skipped due to file extension download filter')
+                            continue
+                    
                     try:
                         self._rate_limiter().try_acquire(filename)
                         download_file(