Dead Pixel Test
Find dead or stuck pixels with solid colors
In fullscreen, click to cycle colors and press ESC to exit. A dot that stands out on any color is a dead or stuck pixel.
Test colors preview
Does your screen have a dead pixel
Fill your screen with solid white, black, red, green and blue to spot dead pixels (always off) and stuck pixels (frozen on one color). Click through the colors in fullscreen and scan every corner. Especially useful when inspecting a used monitor, laptop or TV before buying, or within your return window. Runs instantly in the browser, no install.
Cycle white, black, RGB, CMY and gray to catch every defect type.
Fills the entire display without browser UI so you can inspect every corner.
Click for the next color, ESC to exit — nothing else to learn.
Frequently asked questions
A dead pixel is always off and shows as a black dot on bright colors; a stuck pixel is frozen on red, green or blue and stands out on black.
Stuck pixels sometimes recover with rapid color-cycling exercises. Dead pixels are a hardware fault and need repair or panel replacement.
Policies vary by manufacturer — some offer zero-bright-dot guarantees. Check the policy before buying and run this test as soon as your screen arrives.