How to use the Dead Pixel Test
- Click "Start test" to go full screen
- Click to cycle through colors
- Look for dots that do not change color
About this tool
Check your monitor or phone screen for dead and stuck pixels with full-screen color tests. Dead Pixel Test is part of ToolNest's collection of free web & device. It works instantly in your browser with no account and no installation.
Frequently asked questions
Is the Dead Pixel Test free to use?
Yes. Dead Pixel Test on ToolNest is completely free, with no sign-up, no watermark and no daily limits.
Is my data stored?
No. Most checks run entirely in your browser. Tools that must contact a network service — such as the speed test or IP lookup — only send what is needed to get the result, and we never store it.
Does Dead Pixel Test work on mobile phones?
Yes. ToolNest works in any modern browser on Android, iPhone, iPad, Windows, Mac and Linux. There is nothing to install.