How to use the white screen
- Press Full-screen white. Your whole display turns pure white (#FFFFFF). Turn your screen brightness up for the most light.
- Press Esc or tap the screen to exit full screen. You can also switch to other colours to check for stuck pixels.
Uses for a white screen
A blank white screen is surprisingly handy. Use it as a soft fill light for video calls and selfies, a makeshift lightbox for tracing a drawing or checking film negatives, or a bright reading light in an emergency. A white screen also makes dust, smudges and fingerprints on your monitor easy to see while you clean it, and reveals uneven backlighting, tinting or dead pixels, which show up as black dots.
Photographers use it to check colour temperature and white balance, and some people use it to test a new screen protector for bubbles. On a laptop, plug in the charger first because full brightness drains the battery quickly. The page simply fills your screen with colour in your browser and does not need any permissions.
FAQ
How do I make my screen completely white?
Press Full-screen white and turn your brightness up; press Esc to exit.
Can I use it as a light?
Yes. At full brightness a white screen works as a soft fill or reading light.
How do I spot dead pixels?
Dead pixels show as black dots on a white screen; also try the other colours.