Dead Pixel Test
Check your screen for possible dead or stuck pixels with solid color patterns. Switch colors and inspect the display yourself.
Free to use · No sign-up · Manual visual check
Clean surface marks first and choose a comfortable brightness. Look across the whole screen; stop if you feel uncomfortable.
Color preview Color 1 of 6 · Palette position only
White: Look for dark points that stay in the same place as you change backgrounds.
Use ← → to switch colors and Esc to exit. Tap the color area, move your mouse or press Tab to show hidden controls.
How to test for dead pixels
- Gently clean surface marks according to the display manufacturer’s instructions. Reflections and dust can look like pixel faults. Choose a comfortable brightness.
- Choose a color and start the fullscreen test. Inspect the edges and corners as well as the center, at a comfortable viewing distance.
- Switch backgrounds manually. If a point looks unusual, check whether it stays in the same place across several colors. There is no timer or automatic color cycle.
- Hide the controls to see the entire test area. Tap, move the mouse or press Tab to bring them back. Exit whenever you want; exiting does not produce a pass or fail.
What to look for on each color
- White
- Look for dark points that stay in the same place as you change backgrounds.
- Black
- Look for persistent bright points or unexpected colored points.
- Red
- Look for points that appear dark or a different color against red.
- Green
- Look for points that appear dark or a different color against green.
- Blue
- Look for points that appear dark or a different color against blue.
- Gray
- Look for obvious uneven areas. This is a visual aid, not a quantitative uniformity measurement.
Dead pixels and stuck pixels
A dead pixel often appears as a dark point on bright backgrounds. A stuck pixel or subpixel may remain bright or show an unexpected color. Similar appearances can have other causes, so this stuck pixel test cannot identify a fault type or diagnose its cause automatically.
What this test can and cannot tell you
This screen pixel test provides static backgrounds for your own inspection. It cannot see your display, count faulty pixels or certify screen health. Browser and operating-system color processing can affect the displayed output, and any area hidden by controls or browser chrome has not been inspected. This is not a GPU benchmark, professional calibration or a test for every display problem.
If you notice an issue, repeat the check on several backgrounds and consult the manufacturer’s support and pixel policy. This tool does not repair pixels or guarantee a replacement, refund or warranty eligibility.
FAQ
Is this dead pixel test free?
Yes. All six colors and the fullscreen controls are free, with no sign-up, installation or usage limit.
Does it detect bad pixels automatically?
No. You inspect the display yourself. The page cannot read physical pixel behavior and does not scan, count or automatically locate faulty pixels.
What should I look for on a black or white screen?
On white, look for fixed dark points. On black, look for persistent bright or colored points. Recheck with other backgrounds and rule out surface dirt or reflections.
Can it fix a dead or stuck pixel?
No. This tool only displays static colors. It has no repair or flashing mode and does not recommend pressing on the screen.
Does it work on phones and tablets?
Yes, you can inspect the visible screen area. Native fullscreen support varies by browser and device. Tap the color area to reveal controls, then use Previous, Next or Exit test. A tap does not change the color.
Why can I still see the browser toolbar?
Your browser may not support or allow native fullscreen. In that case the tool uses the visible browser area. It cannot inspect pixels hidden behind browser toolbars or system controls.
How do I check a second monitor?
Exit the test, move the browser window onto the monitor you want to inspect, then start again. Repeat separately for each display; no screen-enumeration permission is needed.
Does seeing no issues mean my screen is perfect?
No. Small or intermittent issues may be missed, and this check does not cover every display fault. Your observation is not hardware certification.
Related tools
For separate graphics-performance and browser-support checks: