Online screen and pixel test

Show solid colors in fullscreen and inspect your display closely to look for dead pixels or pixels stuck on one color.

Ready to test

Display

#000000← → · Esc

Display—

CSS px—

DPR—

Inspection is visual and manual; this test does not automatically detect or diagnose defects. Colors remain still, without flashing effects. Clean the screen to make inspection easier.

?HAVING TROUBLE?Find answers here

Hardware inputs, audio, and video stay on this device. Nothing is recorded or uploaded.HTTPS · en

GETTING STARTED

Show solid colors in fullscreen and inspect your display closely to look for dead pixels or pixels stuck on one color.

Inspection is visual and manual; this test does not automatically detect or diagnose defects. Colors remain still, without flashing effects. Clean the screen to make inspection easier.

NEED A HAND?

HAVING TROUBLE?

Quick answers to help you get back to testing.

↑ Back to test

01Why isn't the test responding?+

Open in your computer's browser and keep this tab visible.

02What can this test measure?+

Inspection is visual and manual; this test does not automatically detect or diagnose defects. Colors remain still, without flashing effects. Clean the screen to make inspection easier.

03Do my data stay on my computer?+

Hardware inputs, audio, and video stay on this device. Nothing is recorded or uploaded.