How to use Dead Pixel Test
- Let the tool load in the preview area above.
- Adjust the settings if the tool supports them.
- Select Open fullscreen for a larger view. Press Escape to return.
- For display checks, compare more than one color and repeat in comfortable room lighting.
What to look for
Cycle through solid colors to help spot pixels that look different from their neighbors. Look for areas that appear visibly different from the surrounding screen, but remember that reflections, viewing angles, display settings and the room lighting can affect what you see.
Limitations and safety
This browser tool is intended for general visual inspection and everyday use. It cannot guarantee detection or repair of every pixel or panel issue, and it is not a substitute for manufacturer diagnostics. Avoid prolonged exposure to bright screens, and follow your device maker's cleaning instructions.
Frequently asked questions
Is this tool free?
Yes. You can use this browser-based tool without downloading a dedicated application.
Will it fix my screen?
No. It displays a color, pattern or animation that can help you inspect your screen; it does not repair hardware.
Can I use it on a phone?
Yes, in a modern mobile browser. Fullscreen support and available controls can vary by device.