Dead Pixel Test – Check Your Screen for Dead Pixels
Free online dead pixel test. Cycle through solid colour screens (red, green, blue, white, black) to detect stuck or dead pixels on any monitor, laptop, or phone display.
How to Detect Dead Pixels
Dead vs Stuck Pixels
A dead pixel is permanently off (appears black on all colours). A stuck pixel is permanently on (shows a fixed colour). Stuck pixels are often fixable; dead pixels usually are not.
RGB Sub-pixel Testing
Each display pixel has red, green, and blue sub-pixels. A faulty sub-pixel shows as a wrong colour dot. Use the pure R, G, B solid fills to isolate individual sub-pixel failures.
Fullscreen is Essential
Click Fullscreen above and examine the entire panel methodically in a dark room. Browser UI elements, taskbars, and window chrome hide edge pixels when not in fullscreen mode.
Related Screen Tools
Improve webcam lighting after your screen passes the test.