Dead Pixel Detector
Test your monitor for dead or stuck pixels by cycling through solid colors. Use keyboard shortcuts or touch gestures to navigate between colors.
How to Use
- 1Enter Fullscreen: Click the button below or press F11
- 2Navigate Colors: Use arrow keys, spacebar, or swipe on touch devices
- 3Mark Pixels: Click or tap to mark suspected dead pixels
- 4Exit: Press Escape or click the exit button
Understanding Pixel Defects
Dead Pixel
Always black
A dead pixel appears as a black dot that never lights up, regardless of the displayed color. It's visible on light backgrounds but invisible on dark ones.
Stuck Pixel
Fixed color
A stuck pixel displays a constant color (red, green, or blue) and doesn't change. It's visible on contrasting backgrounds.
💡 Tip: Cycle through all colors (black, white, red, green, blue) to identify the type of defect. Dead pixels are permanent, but stuck pixels can sometimes be fixed with pixel-fixing software.
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Disclaimer: This tool is provided as-is for informational purposes. Results may vary depending on your display settings and viewing conditions. For warranty claims, consult your manufacturer's dead pixel policy.