Dead Pixel Test

How to Use Dead Pixel Test

1. Click Start Fullscreen Test — The screen will turn red in fullscreen mode.
2. Inspect the screen carefully — Look for any tiny dots that don't match the background color.
3. Cycle through all colors — Click or press Space to go through red, green, blue, white, and black.
4. Check black screen closely — Stuck pixels are most visible on the black background as bright dots.
5. Press ESC to exit — Return to the tool interface when done.

Features

• 5 test colors: Red, Green, Blue, White, Black
• True fullscreen display for accurate inspection
• Click or keyboard navigation (Space/Enter)
• ESC to quickly exit fullscreen
• Visual color preview grid before testing
• Explanations for dead vs stuck pixels
• Works on all screen types and sizes
• No installation or downloads required

Tips for Using Dead Pixel Test

• Use fullscreen mode (F11) to test every pixel on your screen without browser chrome interference.
• Cycle through all colors slowly — some stuck pixels only show on specific color backgrounds.
• Press Spacebar to cycle colors hands-free while you inspect the screen closely.
• If you find dead pixels, also run Touch Screen Test to check for any corresponding touch issues.
• Verify your webcam feed is not affected by screen defects using Webcam Test.
• After hardware checks, confirm your audio output is clean with Speaker Test.
• New displays may have a few dead pixels — check your manufacturer warranty policy for replacement thresholds.