Dead Pixel Test Online
Use full-screen color fills to find pixels that stay black, white, or visibly different from the surrounding panel.
Live screen test
Start with the real patterns.
Find dark dead pixels and dust spots.
What it checks
Use this test when you need a clear visual answer.
Dead Pixel Test is built for quick inspection, not lab measurement. It gives you controlled browser patterns so you can decide whether the screen needs setup, retesting, or warranty attention.
Dead pixels on bright backgrounds
Bright pixels on black
Panel corners and edges
Result guide
How to read the dead pixels result
Start with the white pattern, then switch to adjacent patterns before making a decision. A real display problem usually stays in the same area when the pattern changes. A reflection, viewing angle shift, browser zoom issue, or temporary image setting often changes when you move your head, adjust brightness, or repeat the test after a restart.
Dead pixels on bright backgrounds
Use this page to isolate dead pixels on bright backgrounds under controlled screen patterns. Scan the center, edges, and corners, then confirm the same area with a second pattern before you treat it as a panel issue.
Bright pixels on black
Use this page to isolate bright pixels on black under controlled screen patterns. Scan the center, edges, and corners, then confirm the same area with a second pattern before you treat it as a panel issue.
Panel corners and edges
Use this page to isolate panel corners and edges under controlled screen patterns. Scan the center, edges, and corners, then confirm the same area with a second pattern before you treat it as a panel issue.
Workflow
How to use the dead pixel test
Clean the screen and let the display warm up for a few minutes.
Open the test in fullscreen mode and dim nearby reflections.
Move through each pattern slowly and inspect the full panel, including the corners.
Use cases
Where this screen test is most useful
New monitor check
Inspect a display during the return window before daily use hides small defects.
Laptop and tablet review
Use the same solid screens on portable displays without installing software.
Used display purchase
Run a quick visual pass before buying a second-hand screen.
Reading the result
Practical tips before you decide
Start with white and black
White exposes dark dead pixels. Black exposes pixels that remain lit.
Check from normal distance and close up
Some defects are visible only when you lean in, but daily-use visibility still matters.
Take a photo for records
If you need warranty support, photograph the same pattern where the pixel is visible.
Device setup
Use the same screen test across real viewing setups
The dead pixel test works best when the test matches the way you actually use the display. Keep the room lighting, brightness, scaling, and viewing distance close to normal, then repeat the pattern only after a setting change. This keeps the result practical instead of turning the page into a lab claim.
Desktop and laptop monitors
Use native resolution, 100 percent browser zoom, and the monitor picture mode you normally use. If you change brightness, contrast, overdrive, or color temperature, repeat the dead pixels pass before comparing results.
TVs, projectors, and large panels
Step back to your real viewing distance after a close inspection. Large screens can exaggerate small edge, glow, focus, or processing issues, so confirm anything suspicious with normal video, games, or desktop content.
Phones and tablets
Rotate the device if the browser supports it, clean the glass, and reduce reflections before judging the result. Some mobile browsers limit fullscreen behavior, but the same pattern sequence still helps with quick display checks.
Related tests
Continue with adjacent checks
Stuck Pixel Test
A stuck pixel often stays red, green, or blue. Cycle primary colors to spot the subpixel that is not changing correctly.
White Screen
A fullscreen white screen makes dark pixels, dust, smudges, and brightness falloff easier to see.
Black Screen
A fullscreen black screen helps reveal bright stuck pixels, light leakage, OLED behavior, and dark-room panel glow.
Screen Uniformity Test
Uniformity patterns help you see whether brightness and color remain consistent from center to corners.
FAQ
Dead Pixel Test questions
These answers match the visible test on this page and avoid warranty or measurement claims that depend on your specific display.
What is a dead pixel?
A dead pixel is a pixel that does not light correctly. It usually appears as a fixed dark or bright dot on solid color screens.
Can this test fix dead pixels?
No. This page helps you detect pixel defects. A truly dead pixel normally needs panel replacement or warranty handling.
Which colors should I test?
Use white, black, red, green, and blue. Each color stresses a different subpixel or contrast condition.
Should I test a phone or TV the same way?
Yes. Open the page on the device, enter fullscreen if supported, and inspect the panel under steady lighting.
Can I use the dead pixel test on more than one device?
Yes. Open the same page on each monitor, laptop, phone, tablet, TV, or projector, then compare the dead pixels result under similar brightness and room lighting. Device browsers can handle fullscreen differently, but the visual patterns are still useful for a practical check.
Does this online dead pixels test replace professional calibration?
No. This page is a browser-based visual test for finding obvious display problems and setup issues. For color-critical work, brightness targets, or measured calibration, use a hardware colorimeter or professional display workflow after the visual pass.
How to Check a Monitor for Dead Pixels
A reliable dead pixel check uses fullscreen solid colors, steady lighting, and a repeatable inspection path. The goal is to separate real panel defects from dust, reflections, scaling artifacts, and temporary cable issues.
How to Test a New Monitor
A new monitor should be tested before you mount it, remove packaging, or let the return window pass. Start with panel defects, then verify uniformity, tone, text clarity, refresh rate, and real content.
Monitor Calibration Guide
Browser tests can help you set a monitor to a sensible baseline and spot obvious problems. They do not replace a colorimeter, but they make brightness, contrast, gamma, sharpness, and banding easier to judge before hardware calibration.
Ready to inspect the full screen?
Open the fullscreen pattern and move through the test slowly.