Dead Pixel Test

Start the dead pixel test, enter full-screen mode, then move through the white, black, red, green, blue, and gray screens. Look for dots that stay black, bright, or the wrong color while the rest of the display changes normally.

Open this page on the monitor you want to inspect, clean the panel, set brightness to a comfortable level, and check each full-screen color from edge to edge. Pay extra attention to corners, bezels, and areas that recently took pressure.

Open Dead Pixel Tester Online in Chrome or another modern mobile browser, tap Start Dead Pixel Test, and inspect each solid color screen. Turn off night mode or color filters first so the screen color test is easier to judge.

A dead pixel usually stays black on every color because it is not lighting up. A stuck pixel may stay red, green, blue, white, or bright on certain screens because one or more sub-pixels are stuck on.

Use white, black, red, green, blue, and gray. White helps reveal dark dead pixels, black helps reveal bright stuck pixels and backlight bleed, and red, green, and blue isolate color-channel defects.

Yes. The black screen test can make backlight bleed, glow, and bright edge patches easier to see, while the gray screen helps reveal tint, banding, dirty screen effect, and uneven brightness.

No. This tool is primarily a stuck pixel test and dead pixel checker. Color cycling can help confirm a stuck pixel, but it is not a guaranteed stuck pixel fixer or repair method.

Yes. The dead pixel test runs locally in your browser and only changes the color shown on your display. It does not upload screen data, photos, audio, video, or sensor readings.