Dead Pixel Test

The easiest way to check your monitor for dead pixels, stuck pixels, and screen defects. Fullscreen. No ads.

Detected Refresh Rate
-- Hz
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How to check for dead pixels?

  1. Clean your screen with a soft cloth to ensure you aren't seeing dust.
  2. Click the "Start Test" button above.
  3. The tool will enter full-screen mode.
  4. Click anywhere or press Space to cycle through colors (Red, Green, Blue, White, Black).
  5. Look carefully for any tiny dots that don't change color.
  6. Press ESC to exit the test.

What are Dead vs. Stuck Pixels?

Dead Pixels are black dots that fail to turn on. They are usually permanent.

Stuck Pixels are stuck on a specific color (Red, Green, or Blue). These can sometimes be fixed by flashing colors rapidly (feature coming soon).

Common Screen Defects

Use this tool to detect various display issues on LCD, LED, and OLED panels. Check for backlight bleeding in dark rooms, verify color accuracy, and spot stuck pixels (usually Red, Green, or Blue dots) versus dead pixels (Black dots).

Click to change color
Press ESC to exit