One device. Many ways to check.
Choose a specific check or follow a guided device check. Nothing starts without you.
Audio
Microphone test
See your input level, inspect the signal, and play back a private recording.
Speaker & stereo test
Check left, right, both channels and stereo movement at a comfortable volume.
Headphone test
Check earpiece separation, bass and a controlled frequency sweep.
Tone & frequency test
Generate a selected tone or gentle sweep to compare audio playback.
Camera
Input
Keyboard & rollover test
See received key events, releases, repeats and simultaneous key combinations.
Mouse & double-click test
Inspect buttons, movement, scrolling and suspiciously close click events.
Mouse event-rate estimate
Estimate the rate of pointer events delivered to this browser.
Touchscreen test
Trace continuous lines, inspect edge coverage and observe simultaneous touches.
Display
Dead pixel inspection
Inspect solid colors for dark, bright or stuck pixels and record what you see.
Monitor pattern suite
Inspect gradients, color fields, uniformity and backlight behavior in one workspace.
Motion & ghosting inspection
Follow a moving target to look for trails at an adjustable speed.
Gradient & banding inspection
Inspect continuous grayscale and color ramps for visible stepping.
Backlight bleed inspection
Inspect black and near-black fields for persistent patches of light.
Screen uniformity inspection
Use neutral fields and a grid to inspect uneven brightness and tint.
Refresh rate estimate
Measure browser animation cadence over an eight-second sample.