Dead Pixel Test Online: Free Tool to Check Your Screen

Looking to check dead pixels on your screen? Our free dead pixel test runs entirely in your browser — no downloads, no apps, no registration required.

What is a Dead Pixel Test?

A dead pixel test displays solid colors across your entire screen, making it easy to spot any pixels that aren't working correctly. Dead pixels appear as tiny black dots that never light up, while stuck pixels show as colored dots (often red, green, or blue) that stay lit regardless of what's displayed.

How to Check Dead Pixels Online

Follow these simple steps to run a complete dead pixel check:

1. Clean your screen — Dust and smudges can be mistaken for dead pixels
2. Go to our dead pixel test tool
3. Click "Start Test" to enter fullscreen mode
4. Cycle through colors using arrow keys, spacebar, or by tapping the screen
5. Inspect carefully — look for any dots that don't match the displayed color

Best Colors for Detection

Different colors help spot different defects:

• White: Best for spotting dead pixels (appear as black dots)
• Black: Best for spotting stuck pixels (appear as bright colored dots)
• Red, Green, Blue: Help identify sub-pixel failures where only certain color channels are affected

Why Use an Online Dead Pixel Test?

Online tests have several advantages:

• Works on any device with a browser (monitors, laptops, tablets, phones)
• No software installation required
• Runs instantly — just visit and test
• Privacy-focused — nothing is tracked or stored

Found a Dead Pixel?

If you find a dead or stuck pixel:

• New device? Check your manufacturer's dead pixel policy — many offer replacements
• Stuck pixel? Try running the test for 10-15 minutes; sometimes rapid color cycling can unstick them
• Dead pixel? Unfortunately, truly dead pixels cannot be fixed via software

→ Start Free Dead Pixel Test Now