Dead Pixel Tester
Detect dead, stuck, or hot pixels on your monitor, laptop screen, or TV.
Black
Click to cycle • press F for fullscreen
Pixel types explained
Dead pixel: always black. No power, cannot display any color. Usually permanent.
Stuck pixel: locked on red, green, or blue. One sub-pixel is frozen. Sometimes fixable.
Hot pixel: always bright white. All sub-pixels stuck on. Most visible on dark screens.
How to use
- Click Fullscreen to fill your entire display.
- Scan the screen for any pixel that looks different from the rest.
- Click anywhere (or press →, or Space in fullscreen) to go to the next color.
- Repeat for all 8 colors, since some pixels only show on specific backgrounds.
- Press Esc to exit fullscreen when done.