Dead Pixel Test – Check Your Screen for Dead & Stuck Pixels
Full-screen coloursIn full screen: click or press → for the next colour, Esc to exit.
Ready
- Runs locally, nothing uploaded
- Allow permissions when asked
- Some sensors need a phone
- Runs inside your browser
- No upload, no account
- Nothing saved after you close
Full-screen dead and stuck pixel checker
Go full screen and cycle through black, white and primary colours. A pixel that stays one colour is stuck; one that stays black is dead.
Dead vs stuck vs hot pixels
Dead pixels stay black on white, stuck pixels show one colour (red, green or blue), hot pixels stay white on black.
Monitor test colours
Grey reveals uniformity and banding; black in a dark room reveals backlight bleed and IPS glow.
Warranty
Many makers replace screens only above a pixel count; check the pixel policy.
How to Use the
Dead Pixel Test
- 01
Clean
wipe the screen so dust is not mistaken for pixels.
- 02
Full screen
press Start.
- 03
Cycle
click through each colour slowly.
- 04
Inspect
look for dots that do not match the colour.
Dead vs stuck vs hot pixels
Dead pixels stay black on white, stuck pixels show one colour (red, green or blue), hot pixels stay white on black.
Monitor test colours
Grey reveals uniformity and banding; black in a dark room reveals backlight bleed and IPS glow.
Warranty
Many makers replace screens only above a pixel count; check the pixel policy.
Related guides and fixes
Learn more in these guides: Webcam not working, Keyboard ghosting explained, Fix mouse double clicking, Webcam settings.
Frequently Asked Questions
Q.Can dead pixels be fixed?
Dead ones usually not; stuck ones sometimes.
Q.Phone screens?
Yes, works on mobile.
Q.Is anything uploaded?
No. Everything runs locally in your browser.