Dead pixel test
Fill your screen with solid colors to spot dead or stuck pixels in seconds. Wipe your screen first — dust and dead pixels look identical. Click or press → to change color, Esc to exit.
Dead pixel test FAQ
- What's the difference between a dead pixel and a stuck pixel?
- A dead pixel gets no power and stays black on every color. A stuck pixel is frozen on one subpixel color — it shows as a red, green, or blue dot on the screens where it should change. Stuck pixels can sometimes recover; dead ones usually don't.
- How does this test find them?
- It fills your entire screen with solid white, black, red, green, and blue, one at a time. A pixel that stays dark on the white screen is dead; a dot that keeps one color across the colored screens is stuck. Clean your screen first — dust looks exactly like a dead pixel.
- Can a stuck pixel be fixed?
- Sometimes. Rapidly cycling colors in the stuck area for several minutes can revive a stuck pixel, and gentle pressure with a soft cloth (screen off) occasionally works on LCDs. Dead pixels are a hardware fault — check your display's warranty; many manufacturers replace panels above a small defect threshold.