⬜
Click for Fullscreen
Press F or click to enter fullscreen mode
White Screen Tool
Free online white screen tool for brightness testing, screen cleaning, and backlight uniformity checking. Works instantly with pure white (#FFFFFF) color.
How to Use
- 1.Click the white rectangle above or press 'F' to enter fullscreen mode
- 2.Check for dark spots, yellowing, or brightness inconsistencies
- 3.Press 'Escape' or click to exit fullscreen when finished
Use Cases
- •Brightness Test: Check brightness uniformity across your entire display
- •Screen Cleaning: Dust and fingerprints show clearly on white background
- •Backlight Bleed Test: Check for light bleeding around screen edges
- •Dead Pixel Detection: Black pixels are visible on pure white background
Frequently Asked Questions
What is a white screen test?
A white screen test displays pure white (#FFFFFF) to check brightness uniformity, backlight bleeding, and detect dead or stuck pixels that appear as dark spots.
How can I use this to clean my screen?
Display the white screen to make all dust, smudges, and fingerprints highly visible. Gently clean with a microfiber cloth and appropriate screen cleaner.
Is this tool free?
Yes! Completely free, no download, no signup required. Works on all devices including phones and tablets.