Tests
Check your keyboard, mouse, mic, webcam and screen.
Input devices
Keyboard TesterPress every key and watch it light up — find dead or sticky keys.Mouse TesterCheck every button, double-click speed and the scroll wheel.Gamepad TesterSee every button, trigger and stick of a connected controller live.Click Speed TestHow many clicks in 10 seconds? Measure your CPS.Spacebar CounterHow many times can you press space? Timed challenges and saved bests.Typing Speed TestFlowing text, live WPM, and a progress chart of your runs.Touchscreen TestFind dead zones, count simultaneous touches and check full screen coverage.Vibration TestCheck if your phone can vibrate from the browser and play vibration patterns.CompassPhone compass with heading, direction and bearing lock, from your sensors.Spirit LevelPhone bubble level and inclinometer with calibration and slope percent.
Reflexes & memory
Reaction Time TestWait for green, click fast. Average of five rounds in milliseconds.Aim TrainerHit 30 targets fast. Average time and accuracy scored.Number Memory TestHow many digits can you hold in your head?Sequence Memory TestRepeat the pattern as it grows, Simon-style.Visual Memory TestMemorise the lit tiles, then click them from memory.Mental Maths Trainer60-second arithmetic sprints at four levels with speed and accuracy.Stroop TestName the ink colour, not the word, and measure your Stroop effect.
Screen
What Is My Screen ResolutionSee your screen resolution, viewport size and pixel density.Dead Pixel TestCycle full-screen colours to spot dead or stuck pixels.Refresh Rate TestMeasure your screen's real refresh rate in Hz.Eye TestScreen-calibrated Snellen letter chart for a quick at-home vision check.Colour Blindness TestQuick Ishihara-style dot-plate screening for red-green and blue-yellow.Colour Hue TestArrange shuffled colour chips into hue order and score your colour vision.Monitor TestGradient, black level, gamma, sharpness, uniformity and refresh-rate tests.
Audio & camera
Microphone TestCheck your mic is working with a live level meter.Speaker TestTest left and right channels, and sweep the full frequency range.Tone GeneratorPlay any frequency from 20 Hz to 20 kHz — sine, square, triangle, saw.Guitar TunerTune by microphone — a cents needle and standard tuning targets.Webcam TestPreview your camera and check its resolution and frame rate.Hearing Range TestFind the highest frequency you can hear. Not a medical test.Sound MeterApproximate decibel meter from your microphone, with min, average and max.
About these tools
Quick hardware checks that run entirely in the browser: light up every key on a keyboard, count clicks per second, measure reaction time and refresh rate, spot dead pixels, and confirm a mic, webcam, speaker or game controller is actually working before the call or the game starts.