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Free Pixel Fixing App
JScreenFix runs a high-frequency pixel exercise pattern directly in your browser. Drag the fixer over the stuck red, green or blue dot and let it run for at least 10 minutes.
JScreenFix is for fixing bright stuck pixels. A black pixel is usually a hardware failure and may require warranty or panel repair, these are known as dead pixels.
A stuck pixel is a bright colored dot that stays on when the surrounding pixels change. Stuck pixels are usually red, green or blue, but may also be yellow, cyan, magenta or white. JScreenFix can fix many stuck pixels through rapid random color cycling of the stuck pixel and its neighbors.
A dead pixel is black. A dead pixel does not illuminate light (OLED) or let light from backlight through it (LCD). This is usually because the pixel circuitry is damanged and the pixel has no power. Software tools are much less likely to revive a truly dead pixel.
Start with the display you want to treat, then confirm whether the fault is a bright stuck pixel before running the fixer.
Select the device so the best software method is used for the screen you are repairing.
On the selected screen, locate the bright stuck pixel on the black background.
Drag the fixer square until the stuck pixel sits inside the animated area. Fullscreen mode can be used to fix pixels near the edges.
Leave the fixer running for at least 10 minutes.
Inspect the pixel with the black background. If it is not fixed, repeat the fixing process. If still not fixed after one hour, the pixel probably can not be fixed by JScreenFix. Sorry.
External repair guides, manufacturer support pages, and display standards help explain what JScreenFix is intended to treat.
Lifewire distinguishes stuck pixels from dead pixels and names JScreenFix as a no-install option for many stuck pixels.
Dell's display pixel guidelines describe pixels and subpixels, how to inspect a screen, and how bright and dark pixel issues are treated under policy.
EIZO's monitor test includes black, white, red, green and blue defective-pixel checks, matching the practical inspection workflow used before attempting repair.
Wikipedia's defective-pixel overview explains bright-dot, dark-dot, and stuck sub-pixel defects, which is why the diagnosis step matters.
The liquid-crystal display quality-control overview explains that permanently lit or unlit pixels are common enough for manufacturers to define their own acceptance policies.
Tom's Guide discusses OLED dead pixels and failing pixel lines, useful context for separating stuck pixels from hardware faults that a web repair tool cannot resolve.
The standard classified hot, dead, and stuck pixel faults by type, and was later revised into the ISO 9241 display standards.
The ISO 9241 overview summarizes current flat-panel display pixel-defect classes, including allowed bright, dark and subpixel faults per million pixels.