Screen Test Tool

Screen Dead Pixel Test

Free online screen test tool to quickly detect dead pixels, bright spots, or dark spots on your display using full-screen solid colors. Supports red, green, blue, white, black, and more. Works on desktop, mobile, and tablet screens.

Single Color Test

Click any color swatch to display it in full screen

Red

Green

Blue

White

Black

Grey

Yellow

Cyan

Magenta

Orange

Full Test

Cycle through all colors sequentially to test the screen

How to Use

Desktop: Use ← → arrow keys to switch colors, press ESC to exit full screen
Mobile / Tablet: Tap the left half to go to the previous color, right half for the next color