White screen
Fill the display with white or any colour. Use it as a light, while you clean the glass, or to look for a dead or stuck pixel.
- Light, cleaning, pixels
- Free, no sign-up
White, or any colour you pick, fills the screen. Use it as a light, while you clean the glass, or to look for a dead or stuck pixel.
Runs in your browser. Nothing you type or open is uploaded. Free to use, no account. More device tests
How to use it
- Choose white, black, red, green, blue, or any colour.
- The colour fills the screen, and fullscreen opens when the browser allows it.
- Press Close or Escape to come back.
White, colour and pixels
White is the usual choice for a light and for a look across the whole panel. Red, green and blue each light one colour of a pixel, which makes a stuck pixel easier to spot. Black shows a bright stuck pixel. Any colour uses the picker, and the Close label switches to a shade you can read on that colour.
The fill covers the page, and the browser is asked to go fullscreen. Close, or the Escape key, leaves the fill and returns the page. The rest of the page, including its ads, stays in place underneath.
Private by design
Privacy
Everything runs in this page and stays on your device. The colour stays in this tab.
This page also shows Google ads, which can use cookies. Privacy and cookies explains how.
Questions
What is the white screen for?
A white fill works as a light, as a plain background while you clean the glass, and as a way to look for a dead or stuck pixel.
Can I use a colour other than white?
Yes. Black, red, green and blue are one tap, and the picker fills the screen with any colour.
How do I leave the full screen?
Press Close, or press Escape. The page comes back.
Which colour helps with a stuck pixel?
Try white, then black, then red, green and blue. A pixel that stays one colour on every fill is the one to look at.