White Screen
Full-screen color display - pixel test and screen cleaning
White Screen Online - Pixel Test and Monitor Cleaning
Our free white screen tool is a versatile way to test your monitor and clean the screen. Display a full-screen solid colour to detect dead pixels, smudges, stains or uneven backlighting. Works on computer, tablet and phone.
What is a white screen used for?
Dead pixel test
Find pixels that don't light up correctly.
Screen cleaning
Display white to see dirt and smudges clearly.
Backlight test
Check how even the monitor backlight is.
Photo and video
Use as a background or soft light source.
How to detect dead pixels?
- Set the white screen to fullscreen
- Scan the whole screen carefully for dark spots
- Switch to black and look for bright spots
- Test red, green and blue to find stuck subpixels
Types of faulty pixels
Dead pixel
Pixel is always dark - doesn't respond to any signal.
Hot pixel
Pixel is always bright - stays white regardless of image.
Stuck pixel
Pixel shows a fixed colour (red, green or blue).
Frequently asked questions
Can I fix a dead pixel?
Stuck pixels can sometimes be fixed with special apps. Dead pixels (fully dark) usually cannot be fixed with software.
How many colours are available?
The tool offers 12 preset colours plus any custom colour in HEX format.
Does it work on mobile?
Yes, the white screen works on any device with a browser - computers, tablets and phones.