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Turn on the full black screen in a dark room. Check if the pixels are completely turned off; if it's not, you can actually see the screen dark gray. If it's dark grey, it's LED; otherwise, it's OLED.
Online tool - full black screen page. To make second monitor dark without turning it off, to hide fact computer is active, to save electricity, to relax eyes.
Enable full black screen on your display with the black screen test to find dead pixels or wipe your screen clean & dazzling.
Make your screen black. Click or tap to turn your display all black. Works with multiple other colors too. Useful for cleaning your screen or spotting dead pixels.
Black Screen is the simplest way to display a black screen on any device or download a black image in any size. You can use it to clean your screen or save power.
Turn your display into full black screen on any device. Use the black screen to test dead pixels, cleaning screen, compare displays, or save power etc. Click the box below to go fullscreen.
Test your computer screen with different colors. Turn your screen full black, full white, full orange, full green, or any color of your choice.
