Dead Pixel Test
Check any monitor, laptop, TV, or phone for dead and stuck pixels. This free test cycles your screen through white, black, red, green, and blue — the colors that make faulty pixels easiest to spot.
Click or press Space to change color • ESC to exit
How to test for dead pixels
1
Start fullscreen
Press “Start test” to fill your screen with the first test color.
2
Cycle the colors
Click or press Space to move through white, black, red, green, and blue.
3
Inspect closely
On each color, look for dots that stay dark or stay a single color.