Detect dead, stuck, or hot pixels on your display
This tool helps you detect dead pixels on your display. Different solid color backgrounds make it easier to spot problematic pixels on your screen.
Click the button to enter fullscreen mode and observe your screen under different colors
Click the 'Enter Fullscreen Test' button to go fullscreen
Click the screen or press Space/Arrow keys to cycle through different colors
Carefully observe the entire screen for any abnormal pixels
Press ESC to exit fullscreen mode
A pixel that remains black regardless of what color is displayed. This type of pixel cannot be fixed and is usually a hardware defect.
A pixel that always displays a single color (such as red, green, or blue). Sometimes this can be fixed with pixel repair tools.
A pixel that appears abnormally bright on dark backgrounds. This is less common but still indicates a display issue.
Quick browser-based visual diagnostics
Simple controls for repeatable screen checks
Helpful for troubleshooting monitors and displays
No installation required before testing
Use Dead Pixel Test to detect dead, stuck, or hot pixels on your display.
Use it when you want a fast visual check before calibration, troubleshooting, or buying a new display.
Open the test in a stable viewing environment and compare multiple patterns or levels for more reliable results.