Dead Pixel Test
Cycle through 9 solid colors in fullscreen to detect dead, stuck, or hot pixels.
Red
Green
Blue
White
Black
Yellow
Cyan
Magenta
Gray
How to use:
- Click "Start Test". Your screen will go fullscreen with a solid color
- Look carefully for any pixel that doesn't match the background color. That's a dead or stuck pixel
- Click anywhere or press Space / → to cycle through 9 colors (Red, Green, Blue, White, Black, Yellow, Cyan, Magenta, Gray)
- Press Esc to exit at any time
Tip:Dead pixels appear as black dots on bright screens. Stuck pixels show a fixed color that doesn't change. Test in a dimly lit room for best results.
About dead pixels:
- Dead pixel: Always black. The pixel is completely off
- Stuck pixel: Always shows one color (red, green, or blue) regardless of what's displayed
- Hot pixel: Always white. The pixel is permanently on
- This test works on monitors, laptops, tablets, and phones
- No data is collected. Everything runs locally in your browser