Device tests
Test your webcam, microphone, keyboard and screen for dead pixels, right in the browser. Nothing is recorded or uploaded.
Part of Developer & Web
- Webcam TestCheck that your camera works before a call: live preview, resolution and frame rate, camera picker, mirror view and snapshot. Nothing is recorded.
- Microphone TestCheck your microphone: live level meter and waveform, clipping warning, echo and noise suppression toggles, and a 5-second recording to play back.
- Keyboard TesterPress every key and watch it light up on a full-size ANSI or ISO diagram, with key codes, rollover count and stuck-key detection.
- Dead Pixel TestFill the screen with solid colours to spot dead, stuck or hot pixels and backlight bleed, with an optional stuck-pixel fixer (opt-in, flashing).
Check hardware before a video call, an exam or a return deadline. The webcam test shows the camera's picture and real resolution, the microphone test shows a live level meter and lets you play back a short recording, the keyboard tester lights up every key you press, and the dead pixel test fills the screen with solid colours so stuck pixels stand out.
Camera and microphone access is requested by your browser, used only on this page, and switched off when you leave; nothing is recorded or uploaded.