White Screen
Fullscreen tool for display testing. Works in-browser, no signup.
White
Pure white — full-brightness test, dead-pixel search on dark elements, tracing lightbox.
Press Esc to exit
About this tool
A full-screen pure white background at maximum brightness. Common uses: (1) checking for dead pixels — any dark spot on the screen is a fault; (2) using your phone or tablet as a tracing lightbox behind paper; (3) calibrating your monitor's white point; (4) making handshadow puppets on the wall. Click Go Fullscreen to hide browser chrome. Press Escape to exit.