Devices & Browsers
Check your webcam, microphone, keyboard and mouse, and inspect your browser’s capabilities — instantly.
6 tools
Browser Inspector
A clear list of everything your browser shows to websites without asking — browser, OS, screen, language, GPU — plus support for 60+ features such as WebGPU and video codecs. Results are shown on the spot and never sent anywhere.
Keyboard Test
Each key lights up on the on-screen keyboard as you press it, so dead keys stand out immediately. Supports US and Japanese JIS layouts with numpad, and measures maximum simultaneous keys and chatter (one press registering twice).
Microphone Test
Start the mic to see input level (dBFS), waveform and spectrum. Clipping, noise and mute are detected automatically, and a guided speak test rates whether your mic is good enough for meetings. Nothing is uploaded.
Mouse & Wheel Test
Test all five mouse buttons and the wheel, and automatically catch “chatter” — single clicks registering as double clicks. Double-click interval, wheel counts, polling rate (Hz) and drag breaks are measured in numbers.
Webcam Test
Check your camera, its real resolution and frame rate in one click. If it doesn’t work, you’ll see the cause — permission, another app using it, not connected — and how to fix it. Nothing is recorded or uploaded.
Speaker Test
Press a button to play the left, center or right channel, a 20 Hz to 20 kHz sweep, or in-phase and out-of-phase noise. Every sound is generated in your browser, and the default volume is a quiet −24 dBFS.