About DeviceTest

DeviceTest is a collection of free, browser-based hardware testing tools. Test your microphone, webcam, speakers, keyboard, screen, and more — instantly, with no downloads or sign-ups required.

Why We Built This

We got tired of downloading sketchy apps just to check if our mic works before a Zoom call. Every tool here runs locally in your browser using standard web APIs. No data leaves your device.

Technical Details

• Web Audio API — tone generation, speaker cleaning, hearing tests
• getUserMedia API — microphone and webcam testing
• Keyboard Events API — keyboard testing
• Fullscreen API — dead pixel detection
• Zero dependencies, zero frameworks, pure HTML/CSS/JS