Device tests
Check your microphone, camera, keyboard and other device inputs in the browser before a call, class or recording — no install or account needed.
9 tools
CPS TestTest click speed with mouse, touch, Space or Enter, then compare a clear fixed-time CPS score and your local best.Dead Pixel TestRun nine precise full-screen colour fields with arrow-key controls and an adjustable automatic cycle.Keyboard TesterTest a full-size 104-key layout, check how many keys register together, and catch stuck or double-firing keys.Mic TestCheck the right microphone, see its input level, then record a short sample and hear it back — entirely in your browser.Mouse TestCheck every browser-visible button, then make 20 slow single presses to screen double-click patterns without relying on a raw counter.Reaction Time TestReact to five random visual signals, then see an average, median, spread and laboratory-reference percentile without an account.Speaker TestConfirm left and right channels first, then follow a live 20 Hz–20 kHz sweep without installing an app or granting microphone access.Typing TestType the sample text and see your words-per-minute and accuracy update live.Webcam TestCheck the camera your browser will use, frame yourself with a grid, and save a local PNG snapshot before a call.