Single-color defects
Solid RGB screens expose pixels that remain locked to one color channel.
Monitor diagnostics
Free Open Source Stuck Pixel Test Online
Check for pixels that stay red, green, blue, or white even when the whole screen changes color. This browser test works on monitors, laptops, and phones.
RGB screens
No installs
Fast check
8
Color screens
1
Browser tab
Local
Processing
Sub-pixel checks
Red, green, and blue screens make single-color defects easier to spot.
Useful after shipping
Inspect new or recently moved screens for color-specific damage.
Live display check
Stuck Pixel Test Tool
Run the same screen checker below, but focus on pixels that stay lit in one color while the background changes.
Screen Test Preview
Click to Start Full Screen Test
💡 Pro Tip: Clean your screen first! Use arrow keys (← →) or click to cycle through colors in full-screen mode. Press ESC to exit.
Test Statistics
Tests Run
0
Colors Tested
0
What to Look For
- Dead Pixels: Permanent black dots (all colors)
- Stuck Pixels: Dots stuck on one color (red/green/blue)
- Hot Pixels: Always white pixels
- Color Uniformity: Even color across entire screen
Testing Best Practices
- Clean your screen with a microfiber cloth
- Test in a dark or dimly lit room
- View from your normal distance
- Test all 8 colors thoroughly
- Look at edges and corners carefully
- Take your time - don't rush
🔒 Privacy First: This test runs entirely in your browser. No data is collected or sent to any server.
Screen Test Active
Use arrow keys (← →) or click to cycle colors • Press ESC to exit
RGB focused
Designed for red, green, and blue sub-pixel checks
Fullscreen ready
Inspect the panel without browser chrome
Works on many displays
Monitors, laptops, tablets, and phones
No account needed
Open the page and test immediately
Sub-pixel inspection
What This Stuck Pixel Test Helps You Find
Stuck pixels often appear as tiny red, green, blue, or white dots that do not follow the rest of the panel.
Always-on white pixels
White backgrounds and black backgrounds help confirm hot or bright pixels.
Quick retesting
If you try a pixel-fix method, use this page again to see whether the defect changes.
No software dependency
The test runs in a regular browser tab with simple controls.
Simple workflow
How to Check for Stuck Pixels
Use high-contrast color screens and look for dots that stay bright or remain one color.
01
Start the checker
Open the live screen test and switch to a clean full-screen view.
02
Check RGB colors
Move between red, green, blue, black, and white screens to isolate stubborn color defects.
03
Confirm the defect
A stuck pixel usually stays visible on multiple backgrounds instead of disappearing with the rest of the panel.
Search Intent Cluster
Popular Screen Checks
The same full-screen tester can be used for black-screen, white-screen, dead-pixel, stuck-pixel, and general monitor inspection.
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Run the complete browser-based monitor test with full-screen colors and quick inspection tips.
Open pageBlack Screen Test
Open a clean black screen to inspect backlight bleed, glow, and bright defects.
Open pageWhite Screen Test
Use a full white screen to spot stuck pixels, dust, tint, and uniformity issues.
Open pageDead Pixel Test
Use black, white, and color screens to spot pixels that stay permanently dark.
Open pageBacklight Bleed Test
Use a full-screen dark display with adjustable brightness to inspect for backlight bleed, IPS glow, and clouding.
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What Is a Stuck Pixel Test?
A stuck pixel test helps you find pixels that remain lit in one color, usually red, green, blue, or white, even when the rest of the display changes. These defects are easier to diagnose on solid RGB screens than on busy desktop backgrounds.
This page uses the same browser-based screen tester as our main display tool, but it targets the specific search problem people have when they notice a bright colored dot on a monitor or laptop panel.
Best Colors for Checking Stuck Pixels
- Black: Good for spotting bright or white pixels.
- White: Helps confirm colored defects that contrast against a light background.
- Red, Green, Blue: Best for isolating sub-pixel issues.
- Cyan, Magenta, Yellow: Helpful for confirming mixed color behavior.
If the pixel never lights at all, return to the dead pixel test to confirm the defect type.
Can Stuck Pixels Be Fixed?
Sometimes. A stuck pixel may improve after gentle pixel exercise methods or extended use, especially if the problem is limited to one sub-pixel channel. This page is useful before and after any attempted fix because you can retest the screen on the same set of solid colors.
If the defect never changes across bright and dark screens, it may be a dead pixel instead of a stuck one.
Stuck Pixel Test FAQ
What color is a stuck pixel?
Stuck pixels often appear red, green, blue, or white because one or more sub-pixels remain active when they should change with the rest of the screen.
Should I test in full-screen mode?
Yes. Full-screen mode removes browser bars and distractions so you can inspect the whole panel, including edges and corners.
Is a stuck pixel the same as backlight bleed?
No. Backlight bleed is a larger glow or uneven brightness pattern, while a stuck pixel is a tiny single-pixel or sub-pixel defect.
Screen Tester Guide
Quick steps to run the screen tester and review your pixel issues results.
Start the test
- Open the tool and prepare to begin.
- Cycle colors in full screen view.
- Reset to run another quick check.
Adjust settings if needed
- Review tool options for your ideal test.
- Switch inputs or settings if results look off.
- Reset to run another quick check.
Review results
- Look for missed inputs or delays.
- Compare multiple runs for consistency.
- Export or note results if required.
Why is the tool not responding?
Make sure the page is focused and the correct device is selected.
How do I reset the test?
Use the reset button to clear results and start over.
Does this work on mobile devices?
Most tools work best on desktop, but mobile may still function for basic checks.
Can I run multiple tests in a row?
Yes. Reset after each run to compare results.
Is the test private?
Testing runs locally in your browser and is not uploaded.
What should I do if results look wrong?
Try another browser or device to confirm the issue.