Free Toolkit

Dead Pixel TesterTest your screen for dead or stuck pixels by cycling through full-screen solid colors.

Dead Pixel Tester illustration
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Dead Pixel Tester

Test your screen for dead or stuck pixels by cycling through full-screen solid colors.

How to Use
1

Select Color

Choose red, green, blue, white, or black.

2

Go Fullscreen

Enter fullscreen for complete testing.

3

Inspect

Look for pixels that do not match the color.

What Is Dead Pixel Tester?

Identifies dead, stuck, and hot pixels by filling the screen with solid colors. Dead pixels are permanent black dots, stuck pixels show constant color, hot pixels are always white. Uses the Fullscreen API for complete pixel coverage. Essential for new monitor inspection and display troubleshooting.

Why Use Our Dead Pixel Tester?

  • Tests for dead, stuck, hot pixels
  • Fullscreen coverage
  • Multiple test colors
  • Essential for new monitors
  • No installation needed

Common Use Cases

New Monitor Check

Inspect within return window.

Warranty Claims

Document pixel defects.

Troubleshooting

Distinguish pixel defects from software issues.

Technical Guide

Fullscreen API with full-viewport div. Cycles primary colors and extremes. Dead pixels most visible against specific backgrounds. Escape or click to exit.

Tips & Best Practices

  • 1
    Test all colors
  • 2
    Dim room lighting
  • 3
    Black for stuck, white for dead pixels
  • 4
    Test within first few days of purchase

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Frequently Asked Questions

QCan it fix dead pixels?
No, only finds them. Stuck pixels can sometimes be fixed with exercisers.
QHow many for replacement?
Most manufacturers require 3-5+, policies vary.

About Dead Pixel Tester

Dead Pixel Tester is a free online tool from FreeToolkit.ai. All processing happens directly in your browser — your data never leaves your device. No registration required. No ads. Just fast, reliable tools.