Free dead-pixel & display test

Run a free phone display test with solid colours to inspect dead pixels, lines, tint and screen burn-in.

How to run this check

Show white, black, red, green, blue and grey. Tap to move between colours. Inspect all corners for stuck dots, lines, tint and faint ghost images. Use a comfortable brightness.

What the result means

The person viewing the screen confirms the result. The website cannot see physical pixel defects or prove that the panel is original. Fullscreen support varies by browser.

Permissions and preparation

No device permission is required.

Results are saved only in this browser for up to 24 hours. This single test does not replace a complete used-phone inspection.

Run the full buyer check