This free stuck pixel fixer runs a rapid color-noise pattern in a draggable square — position it directly over a stuck pixel and let it run. No download, no app.
RUNS ENTIRELY IN YOUR BROWSER · NOTHING IS RECORDED OR SENT ANYWHERE
Last updated: · Reviewed for accuracy against current browser APIs
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Drag the noisy square directly over your stuck pixel, then click Start Fixing.
00:00
Drag onto the stuck pixel
00:00Recommended minimum: 10 minutes · try up to 60 for stubborn pixels
Use a black background to spot a bright stuck pixel clearly before you start.
Click "Start Fixing."
The square fills with rapid, random color noise — this is the pixel exercise pattern doing its work.
Drag the square directly over the stuck pixel.
Positioning matters — the effect only really works on the exact pixel underneath the noise.
Use fullscreen for pixels near the edge.
Fullscreen gives you the entire screen to position the square anywhere, including corners.
Let it run for at least 10 minutes.
The timer tracks your session — check the pixel once you hit the recommended minimum.
Repeat up to about 60 minutes for stubborn pixels.
If it's still not fixed after an hour total, this tool likely can't resolve that particular pixel.
Stuck is not dead — check which one you actually have
Before spending 10, 30, or 60 minutes running this tool, it's worth confirming what you're actually dealing with, since the two look similar but respond completely differently to fixing attempts.
Type
Appearance
Can this tool help?
Stuck pixel
A bright dot — red, green, blue, or a mix — that stays lit when everything around it changes
Yes, often — this is exactly what it's designed for
Dead pixel
Always black, no matter what's displayed
No — there's no power reaching it to influence
If you're not sure which one you're looking at, our Dead Pixel Test fills your whole screen with solid colors, making it much easier to tell — a stuck pixel stands out clearly against a matching solid background, while a dead pixel stays black even against white.
How this actually works
Inside an LCD or OLED panel, each pixel is switched on and off by a tiny transistor. A stuck pixel's transistor is still receiving power — it just isn't responding correctly to the signal telling it to change color, so it stays frozen on whatever value it happened to lock onto.
This tool exploits that by rapidly cycling through random colors — genuine per-pixel noise, not just a handful of solid colors in sequence — many times per second, directly on top of the stuck pixel. The idea is that repeatedly forcing the transistor to attempt every possible state, over and over for an extended period, can sometimes jolt it back into switching normally. It's not a guaranteed fix and nobody fully understands why it works on some pixels and not others, but it's harmless to try and has helped plenty of people avoid an unnecessary repair or replacement.
Getting the best results
Positioning is everything. The noise pattern only exercises the exact pixels underneath it — a square that's a few pixels off the stuck one is doing nothing useful.
Zoom in if you can. If your browser or OS supports it, zooming in slightly can make it easier to confirm the square is precisely covering the stuck pixel before you commit to a long session.
Use fullscreen for edge and corner pixels. The windowed view can't always reach every part of the screen, especially near the very edge.
Be patient. Many people see results within the first 10 minutes, but some stuck pixels take multiple sessions over 30–60 minutes total.
Keep the device awake. Adjust your sleep or screensaver settings before a long session so the screen doesn't dim or turn off partway through.
How long to run it, realistically
Session length
What to expect
10 minutes
A reasonable first attempt — many fixable stuck pixels respond within this time
30 minutes
Worth trying if the first attempt didn't fully resolve it
60 minutes
A reasonable upper limit — if nothing has changed by here, this method probably won't help this pixel
Multiple sessions over days
Some people report success after repeated attempts on separate days, though results vary
If it doesn't work
Some stuck pixels simply don't respond to this technique, and that's worth accepting after a genuine effort rather than running it indefinitely. If an hour or so of attempts hasn't helped, a couple of options remain: the gentle pressure method (turning the screen off, pressing very lightly on the spot with a soft cloth for a few seconds, then turning it back on) works for some people, though it carries a small risk if too much pressure is used. Beyond that, it comes down to your manufacturer's or retailer's own dead/stuck pixel policy — some will repair or replace a screen with a single stuck pixel, many require a higher number of defects before they'll act, and it's worth checking that policy specifically rather than assuming.
Frequently asked questions
How do I fix a stuck pixel?
Click Start Fixing, drag the noisy square so it sits directly over the stuck pixel, and leave it running for at least 10 minutes. Check the pixel against a black background afterward.
Will this fix a dead pixel?
No. A dead pixel has no power reaching it at all, so there's no way for a color-cycling pattern to influence it. This tool only has a realistic chance with stuck pixels — ones that are lit but frozen on a single color.
How long should I run the fixer?
Start with at least 10 minutes and check the pixel. If it's still stuck, longer sessions of 30 to 60 minutes give a better chance. If an hour of total runtime hasn't helped, that pixel likely won't respond to this method.
Why does exact positioning matter so much?
The rapid color cycling only exercises the pixels directly underneath the noise pattern. If the square is even slightly off the stuck pixel, it isn't being exercised at all, no matter how long you leave it running.
Is it safe to leave this running for a long time?
Yes. Displaying rapidly changing colors is normal use for any screen. Just make sure your device won't go to sleep or dim during the session.
What's actually happening when this works?
A stuck pixel's transistor is receiving power but frozen in one state. Rapidly and repeatedly forcing it through every color can, in some cases, jolt it back into switching normally, though this isn't guaranteed.
Can I use fullscreen for a pixel near the edge of my screen?
Yes. Fullscreen mode gives you the entire display to drag the square into, including corners and edges that might not be reachable in the smaller windowed view.
Does this work on phones and TVs, not just monitors?
Yes, the same technique works on any screen you can open a browser on and position the noise square over, including phones, tablets, laptops, and smart TVs with a browser.
What if the fixer doesn't work after an hour?
At that point the pixel is unlikely to respond to software methods. You can try the gentle pressure method, or contact the manufacturer about a repair or replacement depending on their pixel-defect policy.
More tools on ProDeviceTest
Troubleshooting a whole screen rather than just a stuck pixel? These run the same way — instant, no download, right in your browser.
Dead Pixel Test — check your whole screen for dead, stuck, or hot pixels
ProDeviceTest