All device tests
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Display
21 testsDead pixel test
Go fullscreen. Find bright spots, stuck pixels, and the tiniest flaws.
Refresh rate test
See how often your browser redraws, with a real frame-time chart.
Ghosting test
Follow the motion. Learn to recognize dark trails and bright halos.
Backlight bleed test
Use a black screen to inspect edge glow and IPS viewing-angle effects.
Gradient & banding test
Inspect smooth black-to-white and RGB transitions for visible steps.
OLED burn-in check
Show uniform colors and patterns to look for persistent image retention.
Black level test
Inspect near-black detail and shadow visibility.
Grayscale test
Compare grayscale steps from deep shadows to highlights.
RGB color test
Inspect primary and secondary color fields for uneven pixels.
Contrast test
Use fine lines and black-white patterns to inspect contrast detail.
Screen tearing test
Move synchronized bars to observe tearing and frame pacing.
Gamma visual test
Compare gamma reference patterns without claiming calibration accuracy.
HDR capability check
Check browser HDR media hints and inspect a high-range pattern.
Flicker observation test
Show gray patterns for camera-assisted PWM flicker observation.
Backlight halo observation
Inspect local dimming halo patterns on Mini LED displays.
Color depth observation
Look for banding in subtle ramps; this is not a panel bit-depth measurement.
Color gamut comparison
Compare sRGB and P3 reference colors visually.
Color accuracy observation
Inspect reference color patches; a colorimeter is needed for ΔE.
Brightness observation
Compare brightness patterns visually; nits require a meter.
Screen size & PPI calculator
Calculate pixel density and display area from size and resolution.
Aspect ratio calculator
Calculate aspect ratio and compare common display formats.
Keyboard
1 testsMouse
3 testsMouse tester
Left, right, scroll, and side buttons. Put every click to the test.
Double click test
One click or two? Catch suspicious repeated clicks with a live timeline.
Mouse event rate
Move your mouse and measure the input events your browser receives.
Controller
2 testsAudio
2 testsCamera
1 testsTouch
1 testsSystem
2 testsYour clicks, camera, and audio stay on your device. That’s a promise.