d3vices

B-01Fullscreen API

Display & dead pixel test

Find dead pixels, stuck subpixels, backlight bleed and colour banding. Full-screen solid colours, greyscale ramps, RGB sweeps and geometry grids, driven entirely from the keyboard.

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Permissions

None. This test needs no browser permission at all.

Nearby instruments

B-02

Screen information

Resolution, device pixel ratio, colour depth, colour gamut, refresh rate, orientation and safe-area insets.

A-01

Microphone test

Check that your mic is heard, see a live waveform, watch the input level and record a short clip to play back.

A-02

Speaker test

Play a tone through the left and right channel independently, sweep the audible range and check for a blown driver.

A-03

Camera test

See your webcam live, read the resolution and frame rate it actually delivers, and switch between cameras.

A-04

Screen share test

Confirm screen sharing works before a call, and see the resolution and frame rate the capture actually produces.