Fullscreen display pixel check
Dead Pixel Test for checking dead and stuck pixels online.
Run a fullscreen dead pixel test online with solid white, black, red, green, blue, cyan, and magenta screens. Use it to check dead pixels, stuck pixels, bright dots, dark dots, tint, and color defects on monitors, laptops, tablets, and phones.
Method
How this dead pixel test works
The test displays solid colors across the test area or fullscreen. Different colors reveal different pixel problems: black can show bright stuck pixels, white can reveal dark dead pixels, and red, green, and blue can expose subpixel defects.
Use fullscreen mode and inspect the screen slowly. Check the corners, edges, and center. If a dot appears in the same place on multiple colors, it may be a dead or stuck pixel rather than dust.
This is a visual inspection tool. It cannot repair a damaged pixel and cannot replace warranty diagnostics from a device or monitor manufacturer.
Cleaner inspection
Check the screen under stable conditions
Clean the screen before starting the test.
Use fullscreen mode to hide browser UI.
Lower room glare so tiny dots are easier to see.
Cycle through every solid color.
Inspect corners, edges, and the center.
Compare the same spot across multiple colors.
Interpretation
What dead and stuck pixels can look like
A dead pixel often appears as a tiny black dot on white or bright backgrounds. A stuck pixel may appear as a red, green, blue, or white dot that does not change correctly when the screen color changes.
Dust, fingerprints, screen protectors, glare, and browser UI can look like display defects. Clean the display and repeat the test before deciding that the panel has a pixel problem.
Related Tools
Display performance tools in the suite
FAQ
Dead Pixel Test Questions
What does this dead pixel test do?
It shows fullscreen solid colors so you can visually inspect your display for dead pixels, stuck pixels, bright dots, dark dots, tint, and color defects.
How do I check for dead pixels?
Clean the screen, open the test in fullscreen, cycle through white, black, red, green, blue, cyan, and magenta, then inspect the center, corners, and edges closely.
What is the difference between dead and stuck pixels?
A dead pixel usually stays dark. A stuck pixel may stay bright or remain fixed on one color, such as red, green, or blue.
Can this test repair dead pixels?
No. This page is for visual checking only. Some stuck pixels may change over time, but truly dead pixels usually require warranty support or panel replacement.