Free online device tests

Check your screen, keyboard, mouse, controller, microphone, webcam and speakers in the browser. Choose a test below; no installation or account is needed. Camera and microphone tests ask for access when you start them.

Screen tests and fullscreen colors

Inspect solid colors for visible pixel defects, compare browser frame timing, check touch coverage or open a fullscreen light.

White screenOpen a white light or inspect dark marks on the display. Black screenShow black fullscreen to inspect bright dots and light leakage. Color screenChoose a solid color or enter a custom HEX value. Red screenShow pure red fullscreen for a color or subpixel comparison. Green screenOpen a green background or compare the green color channel. Blue screenOpen a blue background or compare the blue color channel. Dead pixel testCycle solid colors to inspect persistent bright or dark dots. Refresh rate testEstimate browser animation timing and compare visible motion. Screen resolutionRead CSS screen size, viewport dimensions and pixel ratio. Online rulerMeasure in cm, mm and inches at actual size after a quick calibration. Touch screen testDraw across a touch area and inspect gaps or multiple contacts.

Keyboard, mouse and controller tests

See which inputs reach your browser: held keys, mouse buttons, wheel events, click speed and controller stick positions.

Keyboard testCheck individual keys, held combinations and repeated key events. Mouse testCheck buttons, wheel events, click intervals and pointer update rate. Double click testCompare intentional single clicks with reported click intervals. CPS testCount clicks during a selected interval and calculate clicks per second. Spacebar counterCount separate spacebar presses with held-key repeats excluded. Gamepad testerInspect controller buttons, analog triggers and resting stick positions. PS4 controller testCheck DualShock 4 inputs with Share and Options button labels. PS5 controller testInspect DualSense buttons, trigger travel and reported stick positions. Xbox controller testCheck Xbox buttons, analog triggers and stick positions.

Microphone, speaker and headphone tests

Record a short microphone sample for local playback, check left and right audio, or compare output at a chosen frequency.

Mic testWatch microphone input and record a short clip for local playback. Decibel meterWatch digital microphone levels or set a reference for an adjusted estimate, with statistics and a live graph. Sound testPlay left, right and both channels through your selected output. Left right sound testCompare stereo channel routing through speakers or headphones. Headphone testCheck headphone channels and compare tones at comfortable volume. Speaker cleanerPlay a short speaker tone with explicit cleaning and repair limits. Water ejectTry a speaker tone; it cannot confirm water removal or dryness. Tone generatorSet a frequency, waveform, volume and stereo balance. Hearing testCompare high-frequency tones on an uncalibrated audio setup.

Webcam and camera test

Preview the selected camera, inspect its active stream resolution and save a snapshot locally before a video call.

Webcam testPreview your camera, inspect stream dimensions and save a photo locally.

Which device test should I use?

Start with the symptom you can reproduce. Use the matching test to narrow down what happens before changing hardware or settings.

How to interpret browser device tests

A responding key, moving waveform or camera picture confirms that an input reached this page during the test. It does not certify every part of the device. Browser support, permissions, operating-system settings and the selected input or output can change the result.

Audio, camera images and input readings are processed locally by these tools. Recording and snapshot options stay on your device. Each test explains its measurements, limitations and useful next checks. Timing estimates are not laboratory hardware measurements; sound tools do not diagnose hearing or guarantee a repair.

Read the testing methods and limitations

Instant and free

Open a test without an account or an installation. Use the controls when you are ready.

Private by design

Your camera, microphone and key presses are processed on your device and never uploaded.

In your browser

On desktop and mobile. Available features depend on your browser and the selected test.