πŸ–₯️ Dead Pixel Test

δΈ­ζ–‡ EN
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Updated: 2026-07-11

Choose Test Color

Click a color to enter fullscreen mode. Carefully inspect the screen for abnormal pixels. Click anywhere or press ESC to exit.

Instructions

1. Dim the room lights for best results
2. Click a color button above to enter fullscreen
3. Carefully look for abnormal pixels:
 β€’ Bright/Stuck pixels β€” visible on black background
 β€’ Dark pixels β€” visible on white background
 β€’ Dead pixels β€” always show the same color
4. Test all colors for a thorough check
5. Click the screen or press ESC to exit fullscreen

How to Use the Dead Pixel Test

Validate your content with the Dead Pixel Test in three steps:

  1. Enter Content to Validate
    Type, paste, or upload the content you want to validate into the input area. The tool accepts direct text input and file upload for batch processing.
  2. Run Validation
    Click the "Validate" or "Check" button to analyze your content. The tool performs a thorough check and provides detailed feedback, including error locations and suggested fixes.
  3. Review Results
    View the validation results, including any errors, warnings, or success messages. If errors are found, the tool highlights their exact location to help you fix them quickly.

FAQ

What is a dead pixel?

A dead pixel is a pixel on a screen that remains a fixed color regardless of the image displayed. It can be a bright pixel (always lit), a dark pixel (always off), or a stuck pixel (showing one color).

Can dead pixels be fixed?

Physical dead pixels are usually permanent. However, some stuck pixels may be revived by rapidly cycling through colors. Open a new browser window with this tool and quickly switch between colors a few times.

How many dead pixels are acceptable?

ISO standards allow a certain number of dead pixels depending on the display class (typically 3-5 per million pixels). Professional monitors aim for zero dead pixels. Contact your manufacturer if you're concerned.

Tips for accurate testing

Test in a dimly lit environment, set brightness to 50-80%, and inspect the screen from 30-50cm distance. Check black background for bright pixels and white background for dark pixels.

Dead Pixel Test - Runs 100% locally in browser | More Tools

Color Name
Click anywhere or press ESC to exit