Device tests
Check your webcam, microphone, speakers, keyboard, and screen before a call or after a repair. The browser asks for permission only when you press a test button.
19 tools
Quick checks
- Webcam test
See your camera picture, check its resolution, and switch cameras.
- Microphone test
Speak and watch the level meter move. Nothing is recorded.
- Speaker test
Play a tone in the left, right, or both speakers to check they work.
- Keyboard test
Press any key and see it light up, so you know which keys work.
- Dead pixel test
Fill the screen with solid colors to spot dead or stuck pixels.
- Screen recorder
Record your screen, a window, or a browser tab and save the video.
Screen and input
- Refresh rate test
Measure how many times a second your screen refreshes.
- Touch test
Touch the screen with one or more fingers to check that touch works everywhere.
- Gamepad test
Press buttons and move the sticks to check a game controller.
- Motion and orientation
See live readings from your phone's motion and tilt sensors.
- Vibration test
Check whether your phone can vibrate from a web page.
- MIDI monitor
Connect a MIDI keyboard or controller and watch the notes come in.
Browser features
- Battery test
See your battery level and whether it is charging.
- Storage inspector
See what this site has saved in your browser.
- Permissions viewer
See which permissions this site has, like camera or location.
- Notification test
Check that browser notifications reach you.
- Clipboard write test
Check that copying to the clipboard works in this browser.
- Codec matrix
See which video and audio formats this browser can play and record.
- WebRTC loopback
Check that video-call connections work in this browser, without a server.
Your files are processed on your device. The few tools that talk to the internet say so before they do.