⚙️ Setup: Tools → WebSocket Server Settings → enable and set a password in OBS.
📺 In Studio Mode, make sure both Program and Preview are showing the same scene.

⚠️ Note for mobile or secure browsers: For security reasons, most mobile browsers (and some desktop ones like Chrome with strict settings) block insecure WebSocket connections (ws://) from secure pages (https://).
👉 To use this tool, you may need to download the file and open it locally from your device storage. No internet required – just OBS running locally.