Device Tests
Quick checks for the hardware you rely on for calls, classes and work — find out whether your microphone picks you up, whether your webcam shows a picture, and whether every key on your keyboard registers.
Keyboard Tester
On-screen keyboard that lights up each key you press, with key details and rollover count.
OpenMic Test
Live mic level meter, device picker and a 5-second record-and-play check.
OpenWebcam Test
Live camera preview with resolution, frame rate, camera switching and a snapshot.
OpenEach test runs in your browser using the same permissions a video-call site asks for. The microphone and camera tests only start after you tap Start and the browser asks your permission; the audio and video stay on your device and nothing is recorded to a server.
They're useful before an important video call or online exam, when a laptop's built-in mic or camera stops working, after plugging in a new headset or webcam, or when testing a second-hand keyboard for dead or stuck keys. When something doesn't work, each test explains the usual causes — a blocked permission, the wrong input selected, or another app holding the device.
What you can use it for
- Check your mic and camera before a Zoom, Meet or Teams call
- Test a new headset, USB microphone or webcam
- Find dead, stuck or chattering keys on a keyboard
- Confirm which camera or microphone the browser is using
- Troubleshoot a 'no camera found' or 'mic not working' problem
Frequently asked questions
Is anything recorded or uploaded?
No. The microphone and camera feeds are processed in your browser and are never sent anywhere. The mic test's optional playback keeps a few seconds of audio in memory only until you leave the page.
Why does my browser ask for permission?
Browsers never let a website use your microphone or camera without asking. The request only appears after you tap Start, and you can revoke it at any time in the browser's site settings.
Do these tests work on phones?
The microphone and webcam tests work on modern Android and iPhone browsers. The keyboard tester is meant for physical keyboards; on-screen phone keyboards report most keys differently.