Stuck Pixel Fixer: Free Online Pixel Repair for Any Screen
Stuck Pixel Fixer. Drag the patch over the bad pixel and click Start Cycling to run this stuck pixel fixer. Run the free white screen test for a few seconds under normal room lighting for the most reliable result.
Interactive Tool
Before You Start
This tool flashes red, green, blue, white, and black rapidly over a small patch. If you are sensitive to flashing lights or have a history of photosensitive seizures, do not use this tool. The animation automatically slows down if your device has “reduce motion” turned on, and you can stop it at any time.
Diagnose the Dot
Dot color is what the dot looks like on a black background (use a white screen to spot a dark dot). Use the window for one dot; fullscreen only when you can’t isolate it.
How to target the dot:
Next step:
When to stop:
Drag the patch below over the stuck pixel on your screen, then let it run for the full duration. You can drag it again mid-run if you need to reposition it. In Fullscreen targeting mode the whole screen flashes instead; press Esc to stop.
Stuck Pixel Fixer cycles red, green, blue, white, and black rapidly over a small draggable patch you position directly on top of the frozen pixel, nudging a stuck sub-pixel back toward normal operation. Drag the patch over the problem spot, pick a duration, and click Start Cycling to run the pattern — success isn't guaranteed, since a genuinely dead pixel won't respond to this at all, but a merely stuck one often will. Because the flashing runs fast, you'll need to confirm the safety notice below before it starts.
One green or white dot that never changes is hard to ignore, and this stuck pixel fixer gives you a free, browser-based way to try to clear it with no software install. You drag a small window of rapidly changing red, green or blue light over the dot, let it run for a set time, then retest the spot. It works as a stuck pixel repair tool on any LCD or OLED display that can open a web page.
Stuck Pixel or Dead Pixel? Run a Stuck Pixel Test First
Before you start any repair, work out which fault you have: stuck pixels still receive power, dead pixels do not, and the fixer only helps the first kind. Run the free custom color screen test to check your display for this issue directly in your browser — no download required.
Bright Pixel, Dark Dot or Partial Sub-Pixel?
Each pixel is made of three sub-pixels in red, green, and blue, each switched by its own transistor. When one switch stays on, you get a colored dot that holds one hue while the picture changes; two stuck sub-pixels mix into yellow, cyan or magenta, and all three give a white bright pixel. A dead pixel's circuit has failed, so on a liquid crystal screen it blocks the backlight and shows as a dark spot on every color. Both are defective pixels, but stuck ones often follow a long static display or a sudden power variation and may recover once forced to switch. Use this table to sort the pixel defects you find:
| What you see on the screen | Likely fault | Try the fixer? |
|---|---|---|
| One colored dot on a black screen | Stuck sub-pixel; the pixels around it work | Yes, run it |
| A white dot that shows on every color | All three sub-pixels of one pixel stuck on | Yes, run it |
| A dark dot on a white background | Dead pixel with no power reaching it | Rarely; record it for warranty |
| A faint ghost of a taskbar or logo | Image retention, not stuck pixels | No; use a burn-in check |
How to Run a Dead Pixel Test on a Black Background
A busy desktop hides faults, so fill the whole display with one single-color field at a time. Wipe the glass with a soft cloth first, switch to full-screen mode and step through the solid colors:
- Black pattern: stuck pixels shine out like stars.
- White: dead pixels show as dark specks.
- Red, green and blue: a partly stuck subpixel changes tint on one of them.
Check the test screens at normal screen brightness from about 30 cm. A colored speck on the black background means the stuck pixel detector has found a candidate. Check your sleep settings too: the fixer needs an active screen, and a display that dims mid-session stops the repair.
How the Stuck Pixel Fixer Repair Protocol Works
Once the dot is confirmed as stuck, here is the protocol on one case: a green dot on a 27-inch 2560 × 1440 monitor running at 144 Hz. The free black screen test works on any screen — laptop, external monitor, or TV — with nothing to install.
- Locate the dot on the black screen; here it sits about two-thirds across and a third down.
- Drag the fixer window over it. The precision window is 100 × 100 pixels, about 23.3 mm square here, so the dot only needs to land somewhere inside the animated area.
- Go full screen if the dot is near an edge; fullscreen mode lets the window reach the last row and column.
- Start the session and look away. Run it for 10 minutes first.
- Check the spot on black, then repeat with a longer round if it hasn't changed.
The same steps fix stuck pixel faults on any device this pixel fixer tool can open, without installing a screen fixing tool. There's no guaranteed success rate, so treat each round as a test: if you fix stuck pixels this way, the dot fades, dims or stays as it was, and dead pixels never respond.
What Color Cycling Does Inside the Panel
The window is a block of flickering pixels driven by a high-frequency, random color sequence. Every frame sends new color values to each pixel underneath, telling the stuck transistor to switch off and on thousands of times. This rapid color cycling is the same pixel exercise other fixing programs use; the pixel fixing tool runs it in your browser at your display's refresh rate. Color changes per round:
$$N_{\text{frames}} = f_{\text{refresh}} \times t$$
where \(f_{\text{refresh}}\) is the refresh rate in hertz and \(t\) the round length in seconds. At 144 Hz, a 10-minute round is \(144 \times 600 = 86{,}400\) frames; at 60 Hz it's 36,000, and at 120 Hz and 240 Hz, 72,000 and 144,000. Keep the flashing pattern out of your direct line of sight while it runs.
How Long Each Bounded Session Runs Before You Retest
Work in short rounds, never overnight:
| Round | Length | Frames at 144 Hz | Running total |
|---|---|---|---|
| 1 | 10 min | 86,400 | 10 min |
| 2 | 20 min | 172,800 | 30 min |
| 3 | 30 min | 259,200 | 60 min (518,400 frames) |
Check the spot on black after each round. Gone: stop. Dimmer: one more round is worth it. Unchanged after one hour in total: more of the same is unlikely to help. Some technicians run 20-30 minutes per round with a power-off rest between attempts: power down, leave it unplugged for a day, then try again. On a laptop, don't let it sleep; shut it down.
A Real Pixel Exercise Session on a Secondhand 4K Display
The decision: keep or return a refurbished 32-inch 3840 × 2160 display bought online, with a 14-day return window running. On day 3, a black wallpaper shows a pale cyan dot just right of centre and low down. The answer came three rounds later: the dot cleared after 60 minutes of running the stuck pixel fixer, so the display stays. Use the green screen test online to confirm whether your monitor shows this issue before you adjust settings or return it.
Diagnosis first. On a black field the dot glows cyan; on a red field it turns white. That pattern matters: cyan is green plus blue, and white on red means the red sub-pixels still respond while green and blue are stuck on. It's a stuck pixel, not a dead one, so the attempt is worth making.
Sizing the target. The display has 8,294,400 pixels at 137.7 ppi, so each is \(25.4 \div 137.7 = 0.184\) mm wide and the 100 × 100 window covers 18.4 mm. But Windows runs at 150% scaling here, so the window actually spans 150 × 150 physical pixels, about 27.7 mm. That's the caveat most guides skip: scaling makes the dot easier to hit, but it doesn't change what each pixel receives.
| Round | Length | Frames at 60 Hz | Result |
|---|---|---|---|
| 1 | 15 min | 54,000 | No visible change |
| 2 | 15 min | 54,000 | Dimmer, faint cyan on black |
| 3 | 30 min | 108,000 | Gone on black, red, green and blue |
Cross-check. The hour delivered 216,000 frames, against 518,400 for the same hour at 144 Hz, only about 42% as much switching. My judgement is to cap by time, not frames: nothing published shows that more frames improve the odds, and a 60 Hz display shouldn't earn a longer session just to match a faster one. The number I'd watch is round 2. A dimmer dot is the only signal that justifies round 3; had it been unchanged, I'd have stopped, photographed it on black and opened a return with 11 days left.
One caveat before relaxing: a pixel that unsticks can stick again. The plan is a black-field check on day 10, four days before the window closes, with the return still open if the cyan dot comes back.
Stuck Pixel Repair on LCD and OLED Screens
Because the tool runs in a web page, it works on any device with a modern browser, from desktop monitors to televisions and projectors. Only the way you reach the dot changes, and dead pixels stay dead on all of them.
Fullscreen Tips for Laptops, Monitors and TVs
On a Windows laptop or a Chromebook, open the page in Chrome and press F11 so the window reaches dots near the bezel; on a MacBook, use the green window button. A desktop display is easier because each pixel is larger. Pixel pitch is \(25.4 \div \text{PPI}\): 0.233 mm on the example 27-inch screen, 0.277 mm on a 24-inch 1080p monitor and 0.156 mm on a 27-inch 4K one. On a TV, use its own browser or cast a laptop tab, at native resolution so one window pixel maps to one screen pixel.
Phones, Tablets and Pixel Refresh Routines
On a phone or tablet, use Safari on an iPhone or iPad, or Chrome on Android, and turn auto-lock off. Pixels are tiny there, about 0.056 mm on a 6.1-inch smartphone at 457 ppi, so cover the dot generously. Some OLED TVs and monitors offer pixel refresh, pixel cleaning or panel care routines; run those from the maker's menu, as they differ from the browser method. Don't confuse image persistence, a temporary ghost from a static app on AMOLED displays, with a stuck dot. If the dot is hard to find, a flash screen fixer fills the whole screen with color instead.
Fixing Stuck Pixels Safely and the Manual Pressure Method
The flashing window changes color many times per second, far above the three flashes per second accessibility guidelines treat as a risk for photosensitive viewers. Look away while it runs, and stop at any discomfort or if the device gets hot.
The manual pressure method is older advice: switch the device off, apply gentle pressure to the dot through a soft cloth for a few seconds, then switch it on. It occasionally frees a pixel but can leave pressure marks or kill neighbouring pixels; never try it on OLED phones or with a pen tip. We'd only consider it on an out-of-warranty LCD after software has failed, and never heat, tap or freeze the screen.
When a Screen Fixer Can't Help: Burn-In, Backlight Bleed and Warranty
A pixel repair tool only changes what the screen is told to show, so it can't touch hardware faults: confirmed dead pixels, a retained image from a static logo, edge glow, cracks or a pixel outage along a line. A pixel fixer utility left on for hours won't change those. Some people hide a corner dead pixel with electrical tape; the real options are below.
Document the Defect and Contact Support
Photograph the dot on black and white, record the model and purchase date, and keep the original files. Contact the seller inside the return window, or the manufacturer after it. Factory defects are handled differently from damage, and some premium lines arrange a replacement for a single bright dot on a new screen.
Pixel Policy and ISO 13406-2 Classes
If an hour of rounds with the fixer hasn't cleared the dot, whether you get a free fix depends on the policy, not on more sessions. Each manufacturer publishes a pixel policy setting how many faults a panel may have before it qualifies for warranty support. Many grew from the old ISO 13406-2 classes, since replaced by ISO 9241-307, which allowed a set number of bright, dark and subpixel faults per million pixels; ASUS's Zero Bright Dot promise goes further and covers even one bright defect. If your defective pixel count sits below the threshold, expect the claim to be refused and a panel replacement to become a paid repair, so weigh the support quote against living with one small dot.
Frequently Asked Questions
- Can you actually fix a stuck pixel?
- Often, yes. A stuck pixel still receives power, so rapidly cycling colors over it can make the stuck sub-pixel switch again. There is no guaranteed success rate, so run short sessions and check the dot after each one.
- Can the stuck pixel fixer repair a dead pixel?
- Rarely. A dead pixel stays dark on every color because no power reaches it, and software can't fix that. Photograph it on a white screen and check the warranty or pixel policy instead.
- How long should I run the fixer?
- Start with 10 minutes, check the dot on black, then try a longer session if it changed. If the dot is still there after about an hour in total, more sessions are unlikely to help.
- Does it work on OLED screens and phones?
- Yes, it runs in any modern browser on monitors, laptops, TVs, phones and tablets with LCD or OLED panels. That doesn't guarantee a fix, and OLED TVs with a built-in pixel refresh routine should use the maker's own option.
- Is the flashing safe to look at?
- Look away while the session runs. The colors change far faster than the three flashes per second treated as a risk for photosensitive viewers, so stop at once if you feel discomfort.
- Do I need to install anything?
- No. The tool runs in your web browser with no download, account or sign-up.
- What should I do if the pixel doesn't change?
- Stop the sessions, photograph the dot on solid colors, note the model and purchase date, and contact the seller or manufacturer if the screen is still covered.