Device tests

Check microphone, camera and speakers, follow a concrete corrective step and compare a repeat check.

Check a local camera preview, delivered frame dimensions and an optional snapshot.

Check the browser microphone signal, timed low-level hints and a decoded, verified local recording.

Play quiet left, right and stereo signals and record your own listening observations.

Inspect static display patterns and test touch points without flashing images.

Compare browser-reported displays with what you see, follow a guided connection check and create a local report.

Measure repeated HTTP responses to Vitali Web Tools, compare runs and download a verified report of timings and variations.

Calibrate a ruler against a known physical length and measure small objects on your screen. Recalibrate after display or zoom changes.

Check physical key positions, layout labels and combinations inside a focused test area.

Inspect buttons, wheel events and click intervals in a focused local test area.