Handy tools
Black Screen
A pure full-screen black display — check OLED burn-in, backlight bleed, or just dim your monitor. No install.
Fill your whole screen with a pure, solid color in one click — white, black, red, green, blue and more. Handy as a soft light source, a background to hunt for dead or stuck pixels, a plain backdrop for photos and video, or to check screen cleaning and backlight bleed. No install, runs right in the browser.
Tip: click the screen or use the arrow keys to switch color, and press ESC to exit. Works best in full screen at 100% brightness.
Or pick a color
Free online black screen tool that fills your whole display with pure black in one click. Use it to run an OLED burn-in check and spot bright dots or stuck pixels that show up against solid black, and to reveal IPS glow or backlight bleed in a dark room. A full black screen also cuts glare and eye strain, dims a second monitor you're not using, saves a little power instead of a screensaver, or serves as a clean dark backdrop for photos and video.
Click or press the arrow keys to cycle through 9 solid colors — black, white, red, green, blue and more — for quick uniformity and dead-pixel checks. Everything runs right in the browser with no download and no install, on any laptop, PC, phone or external monitor. Search terms like black screen, blank black screen and full black screen all land here.