Screen Test
Check your display for dead pixels, bright spots and backlight bleed with multiple pure-color and contrast tests.
Runs in your browser
Real-time
Screen Test
Click a swatch to go fullscreen
Arrow keys switch tests
ESC or click to exit
Turn brightness to max first
Solid colors
Find dead or stuck pixels
Grayscale
Contrast & text
How to read the result
About this tool
Check your display for dead pixels, bright spots and backlight bleed with multiple pure-color and contrast tests.
How to use
- Fill in the input box above, or click "Fill sample" to try it instantly
- Adjust the options as needed — results update as you type
- Click "Run" to get the result, then copy or export it in one click
Tips
- Runs entirely in your browser — your data never leaves the device
- Completely free, no registration, no usage limits
- Most tools compute in real time as you type