Dead Pixel Test
Find dead or stuck pixels on your screen with fullscreen color cycling.
Fullscreen Pixel Tester
This tool will use the Fullscreen API to display solid colors across your entire screen. Cycle through red, green, blue, white, and black to spot any dead, stuck, or hot pixels on your display.
Features
- ✓ Fullscreen solid color display
- ✓ Cycle through red, green, blue, white, black
- ✓ Custom color picker for additional testing
- ✓ Auto-cycle mode with adjustable speed
- ✓ Gradient patterns for uniformity testing
- ✓ Works on monitors, laptops, tablets, and phones
About the Dead Pixel Tester
Our free dead pixel test helps you identify defective pixels on any screen. Dead pixels appear as permanently dark spots, stuck pixels display a constant single color, and hot pixels glow brighter than surrounding pixels.
The test works by filling your entire screen with a single solid color. Against a uniform background, any defective pixel becomes immediately visible. Cycling through primary colors (red, green, blue) plus white and black ensures you catch all types of pixel defects.
This tool is essential when buying a new monitor, laptop, or phone, or when making a warranty claim for a defective display. Simply go fullscreen, cycle through each color, and carefully inspect your screen for any dots that do not match the background.