Video call readiness test

Before a Zoom, Teams, Meet or WhatsApp call, check that your browser can use the camera, hear your microphone, play sound and run WebRTC — all in one place.

The camera and microphone start only after you press the button.

What this checks

Browser support: a secure page, camera and microphone access, WebRTC and Web Audio.
Devices and permissions: whether a camera and microphone are present and allowed.
Camera and microphone: a live preview and a level meter, after you press Start.
Speakers: a short tone — you confirm whether you heard it, because a page can't hear its own output.
WebRTC: a connection between two endpoints inside this page. It proves your browser can encode and decode video, without sending anything over the internet.

This checks your browser, not a specific app. Zoom, Teams and others also depend on their own settings and on your network. To test your connection, use the latency test.

If something fails

Permission blocked: allow the camera and microphone from the icon next to the address bar, then reload.
Device in use: close other video apps — many systems let only one app use the camera.
No sound detected: check the mute switch and the input device in your system sound settings. A muted microphone and a broken one look the same to a browser, so try another microphone before deciding it's faulty.
Windows privacy: Settings → Privacy & security → Camera / Microphone → allow desktop apps and your browser.
macOS: System Settings → Privacy & Security → Camera / Microphone → turn on your browser.

Frequently asked questions

Is my video recorded?

No. The preview and the level meter run only in your browser, and the WebRTC test connects the page to itself. Nothing is recorded or uploaded.

The test passes but my call app still can't see the camera.

Check the app's own camera selection and permissions. Desktop apps need permission from the operating system separately from the browser.