Tests
Dead Pixel Test
Inspect black, white, red, green, blue and gray in fullscreen. Look for dots that remain a different color; use Previous, Next or swipe to compare.
Private by designProcessing happens locally in this browser. Device streams and raw readings are not uploaded.
What this test checks
How to use this test
Inspect black, white, red, green, blue and gray in fullscreen. Look for dots that remain a different color; use Previous, Next or swipe to compare.
What the results mean
A dot that stays bright or dark across several colors deserves a closer visual inspection.
Troubleshooting
Clean the screen gently and compare multiple colors to distinguish dust from a pixel issue.
Browser limitation
This is visual inspection, not automatic pixel diagnosis. Clean the screen to distinguish dust from persistent dots and compare several colors.