diff --git a/static/index.html b/static/index.html
index 55aa79ec..6ed07692 100644
--- a/static/index.html
+++ b/static/index.html
@@ -981,7 +981,7 @@
     <input type="checkbox" id="research-toggle" style="display:none;">
     <input type="checkbox" id="rag-toggle" style="display:none;">
     <input type="checkbox" id="incognito-toggle" style="display:none;">
-    <input type="file" id="file-input" class="hidden" multiple accept="image/*,application/pdf,video/*,.txt,.py,.html,.htm,.md,.json,.csv,.log,audio/*" />
+    <input type="file" id="file-input" class="hidden" multiple />
 
     <!-- Unified chat input bar -->
     <div class="chat-input-bar">
diff --git a/tests/test_chat_attachment_picker.py b/tests/test_chat_attachment_picker.py
new file mode 100644
index 00000000..c274aefa
--- /dev/null
+++ b/tests/test_chat_attachment_picker.py
@@ -0,0 +1,33 @@
+from html.parser import HTMLParser
+from pathlib import Path
+
+
+ROOT = Path(__file__).resolve().parents[1]
+
+
+class _InputParser(HTMLParser):
+    def __init__(self):
+        super().__init__()
+        self.inputs = {}
+
+    def handle_starttag(self, tag, attrs):
+        if tag != "input":
+            return
+        attr_map = dict(attrs)
+        input_id = attr_map.get("id")
+        if input_id:
+            self.inputs[input_id] = attr_map
+
+
+def _inputs():
+    parser = _InputParser()
+    parser.feed((ROOT / "static" / "index.html").read_text(encoding="utf-8"))
+    return parser.inputs
+
+
+def test_chat_attachment_picker_allows_any_file_type():
+    file_input = _inputs()["file-input"]
+
+    assert file_input["type"] == "file"
+    assert "multiple" in file_input
+    assert "accept" not in file_input