Dead Pixel Test - Find Dead, Stuck and Hot Pixels on Any Screen
Dead Pixel Test
Full-screen colours to reveal faulty pixels
Full Screen
Each colour fills the entire display with nothing else in the way.
Nine Test Colours
Black, white, the three primaries, their mixes and mid-grey reveal every kind of fault.
Simple Controls
Click or use the arrow keys to change colour, Esc to leave, or let it cycle on its own.
Nothing to Install
Runs entirely in the browser on any device.
Dead, Stuck or Hot?
A dead pixel stays black whatever colour is shown, and is most visible on white. A stuck pixel stays lit in one colour (often red, green or blue) and shows up on black and on the other primaries. A hot pixel stays white and is easiest to see on black. Dust on the screen can look like a defect, so wipe the panel first and check whether the spot moves.
Test new monitors, laptops and phones as soon as they arrive, because most shops and manufacturers only replace screens within a set return period, and many warranties allow a few faulty pixels before a panel counts as defective. On the black screen in a dark room you can also judge backlight bleed, light leaking around the edges of LCD panels.
Key Takeaways
- White finds dead: Dead pixels show as black dots on white.
- Black finds hot and stuck: Lit pixels stand out on black.
- Test early: Check within the return window.