diff --git a/ttstoy/webui/app.py b/ttstoy/webui/app.py
index f5006f6..f5c4634 100644
--- a/ttstoy/webui/app.py
+++ b/ttstoy/webui/app.py
@@ -565,11 +565,48 @@ def api_chatterbox_voices():
     user_id = session["user_id"]
     ucfg = get_user_config(user_id)
     voices = ucfg.get("chatterbox_voices", [])
+
+    # Validate voices exist on the Chatterbox server
+    cb_url = get_chatterbox_url()
+    server_voices = set()
+    try:
+        r = requests.get(f"{cb_url.rstrip('/')}/api/ui/initial-data", timeout=3)
+        if r.status_code == 200:
+            data = r.json()
+            server_voices = set(data.get("predefined_voices", []))
+    except Exception:
+        pass  # If server unreachable, show all voices without filtering
+
     result = []
+    stale = []
     for v in voices:
+        if server_voices and v not in server_voices:
+            stale.append(v)
+            continue
         parts = v.split("_", 1)
         display = parts[1].rsplit(".", 1)[0] if len(parts) > 1 else v.rsplit(".", 1)[0]
         result.append({"filename": v, "display": display})
+
+    # Auto-clean stale voices from config
+    if stale:
+        try:
+            p = COG_CONFIG_PATH / "settings.json"
+            data = _read_json(p)
+            if data:
+                ucfg_data = data.get(COG_IDENTIFIER, {}).get("USER", {}).get(str(user_id), {})
+                cfg_voices = ucfg_data.get("chatterbox_voices", [])
+                for s in stale:
+                    if s in cfg_voices:
+                        cfg_voices.remove(s)
+                ucfg_data["chatterbox_voices"] = cfg_voices
+                if ucfg_data.get("minimax_voice") in stale:
+                    ucfg_data["minimax_voice"] = cfg_voices[0] if cfg_voices else None
+                with open(p, "w") as f:
+                    json.dump(data, f, indent=2)
+            log.info(f"Auto-cleaned {len(stale)} stale voices for user {user_id}: {stale}")
+        except Exception as ex:
+            log.warning(f"Could not auto-clean stale voices: {ex}")
+
     return jsonify(result)
 
 
@@ -633,6 +670,25 @@ def api_chatterbox_delete_voice(filename):
             return jsonify({"error": f"Server returned {r.status_code}"}), 500
     except Exception as ex:
         return jsonify({"error": str(ex)}), 500
+
+    # Immediately remove from settings.json so the UI updates without waiting for bot
+    try:
+        p = COG_CONFIG_PATH / "settings.json"
+        data = _read_json(p)
+        if data:
+            ucfg = data.get(COG_IDENTIFIER, {}).get("USER", {}).get(str(user_id), {})
+            voices = ucfg.get("chatterbox_voices", [])
+            if filename in voices:
+                voices.remove(filename)
+                ucfg["chatterbox_voices"] = voices
+                # If active voice was deleted, switch to first remaining or clear
+                if ucfg.get("minimax_voice") == filename:
+                    ucfg["minimax_voice"] = voices[0] if voices else None
+                with open(p, "w") as f:
+                    json.dump(data, f, indent=2)
+    except Exception as ex:
+        log.warning(f"Could not update settings.json directly: {ex}")
+
     _write_bot_command(user_id, "remove_voice", {"filename": filename})
     return jsonify({"ok": True})