Device Tests
Test your controller, keyboard, mouse, microphone, speakers, hearing, webcam and screen, and measure your typing speed and reaction time in your browser.
Controllers & input
Controller Tester
Check buttons, triggers, stick drift and rumble on any PlayStation, Xbox, Switch or PC controller, then share a health report.
Fight Stick Tester
Check every button and direction on an arcade stick or leverless controller, read your inputs in numpad notation with frame counts, and find its SOCD mode.
Joystick Tester
See every axis, button and hat switch of a joystick, throttle or rudder pedals at once, and check the stick's centre, range and the throttle for spikes.
Keyboard Tester
Press your keys to see which ones work, catch keys that type twice, and measure how many keys register at once.
Mouse Tester
Check that every button and the scroll wheel work, catch a mouse that double clicks on its own, and measure its polling rate.
Steering Wheel Tester
Check a Logitech, Thrustmaster, Fanatec or any USB racing wheel: rotation, centre, pedal spikes and linearity, shifter gears and paddles.
Audio
Decibel Meter
A sound level meter in your browser: A, C and Z weighting, Leq and L10/L90, a calibration you can check, a noise log for complaints and a classroom light.
Hearing Test
Find your upper frequency limit in about a minute, ear by ear, and see how it compares with typical hearing at your age.
Microphone Test
Check that your mic works, hear how you sound, and get a plain-English diagnosis of level, noise, clipping and Bluetooth problems.
MIDI Tester
See every note, velocity and control your MIDI device sends, find dead or weak keys, stuck notes and scratchy knobs, and hear it with a built-in synth.
Speaker & Headphone Test
Check that each speaker or earcup works, find how deep your bass goes, and catch swapped or out-of-phase wiring in a minute.
Tone Generator
Play a precise frequency or musical note, layer up to three tones, sweep between frequencies, and save exactly what you hear as a WAV file.
Screen
Black Screen
A full-screen solid color, one click away. Use it to clean your screen, check backlight bleed, or dim a display.
Dead Pixel Test
Cycle full-screen colors to find dead, stuck and hot pixels, record where they are, and try to revive stuck ones.
GPU Tester
Find your graphics card, check hardware acceleration, WebGL and WebGPU, and measure how fast your browser draws with the GPU.
Refresh Rate Test
See your display's real refresh rate, frame timing and dropped frames, then compare motion at different frame rates.
Camera
Skill & speed
Reaction Time Test
Click the moment the box turns green, or race the F1 start lights, and see how your reflexes compare.
Typing Test
Type for 15 seconds to 5 minutes or a whole passage, see your WPM, accuracy and the keys that slow you down, then practice them.
Aim Trainer
Six drills for speed, precision and tracking, with your accuracy, time to hit and a map of where every shot landed. No download, mouse or touch.