One device. Many ways to check.
38 focused diagnostics. Choose what applies. Nothing starts without you.
What would you like to test?
Find the problem. Run a quick test. Understand the result.
Audio
6 testsMicrophone test
See your input level, inspect the signal, and play back a private recording.
Start Test AudioSpeaker & stereo test
Check left, right, both channels and stereo movement at a comfortable volume.
Start Test AudioHeadphone test
Check earpiece separation, bass and a controlled frequency sweep.
Start Test AudioTone & frequency test
Generate a selected tone or gentle sweep to compare audio playback.
Start Test AudioMicrophone noise observation
Compare a quiet interval and speech using relative digital audio levels.
Start Test AudioMicrophone clipping test
Observe repeated peaks near digital full scale while you speak.
Start TestCamera
3 testsWebcam test
Preview your camera and inspect its negotiated resolution and frame delivery.
Start Test CameraCamera resolution test
Read negotiated camera width, height and aspect ratio from an active stream.
Start Test CameraWebcam FPS test
Estimate delivered camera frame rate using video frame callbacks.
Start TestController & Gaming
3 testsGamepad & controller test
Inspect buttons, triggers, D-pad, axes and supported haptic feedback.
Start Test Controller & GamingController stick drift test
Sample resting stick positions and compare their offset with a chosen dead zone.
Start Test Controller & GamingWebGL capability test
Check WebGL and WebGL2 availability with a tiny render/readback validation.
Start TestDisplay & Screen
9 testsDead pixel inspection
Inspect solid colors for dark, bright or stuck pixels and record what you see.
Start Test Display & ScreenMonitor pattern suite
Inspect gradients, color fields, uniformity and backlight behavior in one workspace.
Start Test Display & ScreenMotion & ghosting inspection
Follow a moving target to look for trails at an adjustable speed.
Start Test Display & ScreenGradient & banding inspection
Inspect continuous grayscale and color ramps for visible stepping.
Start Test Display & ScreenBacklight bleed inspection
Inspect black and near-black fields for persistent patches of light.
Start Test Display & ScreenScreen uniformity inspection
Use neutral fields and a grid to inspect uneven brightness and tint.
Start Test Display & ScreenRefresh rate estimate
Measure browser animation cadence over an eight-second sample.
Start Test Display & ScreenScreen information
Read screen and viewport dimensions, pixel ratio and orientation.
Start Test Featured · OLED burn-in inspectionDisplay & ScreenOLED burn-in inspection
Inspect persistent image retention using neutral and primary-color fields.
Start TestKeyboard, Mouse & Touch
5 testsKeyboard & rollover test
See received key events, releases, repeats and simultaneous key combinations.
Start Test Keyboard, Mouse & TouchMouse & double-click test
Inspect buttons, movement, scrolling and suspiciously close click events.
Start Test Keyboard, Mouse & TouchMouse event-rate estimate
Estimate the rate of pointer events delivered to this browser.
Start Test Keyboard, Mouse & TouchTouchscreen test
Trace continuous lines, inspect edge coverage and observe simultaneous touches.
Start Test Keyboard, Mouse & TouchTouchpad observation test
Observe pointer movement, clicks and vertical or horizontal scrolling from your touchpad.
Start TestNetwork & System
8 testsDevice & browser information
Read basic browser capabilities, battery and network information where exposed.
Start Test Network & SystemNetwork latency test
Measure a small sample of browser-to-site request timings.
Start Test Network & SystemNetwork jitter test
Inspect variation between consecutive browser-to-site request timings.
Start Test Network & SystemBrowser capability test
Inspect browser hints and the APIs available to this page without requesting media access.
Start Test Network & SystemBrowser permission checker
Read camera, microphone and notification permission states without prompting for access.
Start Test Network & SystemBattery information
Read exposed charge and charging status without claiming battery health.
Start Test Network & SystemManual physical inspection
Record a used-device inspection that browser software cannot perform.
Start Test Network & SystemPrinter test page
Print text, fine lines, grayscale, gradients and alignment patterns.
Start TestMobile & Sensors
4 testsAccelerometer test
Observe acceleration including gravity where motion events are exposed.
Start Test Mobile & SensorsGyroscope observation
Observe rotation-rate readings from browser motion events.
Start Test Mobile & SensorsDevice orientation test
Observe browser-reported alpha, beta and gamma orientation angles.
Start Test Mobile & SensorsVibration test
Request a brief vibration and record whether you felt it.
Start Test