MotionShine01 / Dead
Always dark
A dark dot on white and on every colour. The pixel gets no power, which is a hardware fault a website cannot fix.
Free tool
Dead pixel test, one colour at a time.
Fill your whole screen with one plain colour and look closely. A pixel that stays black on white, or lit on black, stands out at once. Step through black, white, red, green, blue and more with a click or the arrow keys. Found a stuck pixel? Drag the flashing square over it and let it run.
Black
Click or press the right arrow for the next colour, left to go back, Esc to leaveColours
Clean the screen first: a speck of dust looks like a dead pixel but moves when you wipe it.
Stuck pixel fixer
The colours are drawn in your browser. Nothing is uploaded.
What you might see
Dead, stuck, or just dust.
02 / Stuck
Always one colour
A red, green or blue dot that stays lit, best seen on black. One part of the pixel is stuck on, and some recover.
03 / Dust
Moves or wipes off
A grey speck that looks soft at the edges or moves when you wipe the screen with a dry microfibre cloth.
Questions
Good to know.
How do I test a new monitor or laptop?
Open this page on that screen, press Start, and look across the whole screen on each colour, from a normal distance and then closer. Black and white catch most faults; red, green and blue show a pixel stuck in one colour. If you find one, note where it is and check the seller's pixel policy, since many have a return window.
Does the stuck pixel fixer work?
Sometimes. Flashing colours make the stuck part of the pixel switch on and off quickly, and some stuck pixels start working again after a few minutes or after a few runs. It cannot help a dead pixel, which gets no power at all. If nothing changes after a few tries, ask the maker or the seller.
Is the flashing safe?
It flashes much faster than three times a second, which can trigger seizures in people with photosensitive epilepsy. Do not run it if that may apply to you or anyone in the room, and look away while it runs.
What are the grey and colour steps for?
A smooth fade from black to white, or across the colours. Bands or blotches in it show how the panel handles gradients, and uneven brightness shows up as cloudy patches.
It does not go full screen on my phone.
Some phone browsers do not let pages go full screen. The test then fills the browser window instead. Hide the address bar by scrolling, or turn the phone sideways.