Dead pixel
Usually stays black because none of its subpixels are emitting light.
Display
Dead Pixel Test — Check Your Monitor
Fill the display with clean test colors and inspect it at normal viewing distance for pixels that remain dark or the wrong color.
No signup Browser-based Private by design
Inspect every pixel across 14 screens
Clean your display first, dim harsh room lights, and inspect each color at your normal viewing distance.
Stuck pixel
Often remains red, green, blue, or another fixed color. Pixel cycle mode can make it easier to locate.
How to use this dead pixel test
- 1
Clean the screen gently so dust is not mistaken for a bad pixel.
- 2
Launch fullscreen and cycle through each solid color.
- 3
Inspect the whole panel at normal viewing distance.
- 4
Press Escape or use the close control to finish.
Understand the result
- Dark pixels on white and bright backgrounds
- Stuck red, green, or blue subpixels
- Basic uniformity on gray, black, and white
- Visible gradient banding
Common problems
- Dust can look like a dead pixel; inspect from different angles.
- A stuck pixel emits a fixed color, while a dead pixel usually stays dark.
- Panel uniformity varies naturally and this tool cannot certify a display.
Privacy and browser limits
Most readings come directly from browser APIs and stay on your device. Operating systems, browser permissions, scaling, drivers, and hardware can affect what a page can observe.
For the cleanest result, use an up-to-date browser, keep the tab visible, and close apps that may already be using the device.
Questions about the dead pixel test
Is my test data uploaded?
No. This test runs locally in your browser. RatedTechTools does not receive or store the device data shown by the tool.
Can this tool repair a dead pixel?
No. It helps you locate defects. Pixel-cycling remedies are not guaranteed and may not help physically failed pixels.
Should I use fullscreen?
Yes. Fullscreen reduces distractions and makes edge areas easier to inspect.