Get a pure, true black screen in one click. This fullscreen black screen works as a quick display test, an OLED burn in check, a distraction-free blank screen, or just a way to darken your display without turning it off.

What this black screen test actually checks

A black screen online is one of the simplest ways to spot problems a normal desktop hides. Against pure black, dead or stuck pixels show up as small bright dots that are easy to miss against colorful wallpapers or windows. It’s also useful for checking backlight bleed on LCD monitors, since any light leaking in from the edges of the panel becomes obvious against solid black, and for spotting uneven brightness or clouding across the panel.

On OLED screens specifically, black pixels are actually switched off rather than dimmed, so a black screen image also gives you a quick way to see true black reproduction and check for any residual glow or discoloration in the panel. It’s also a handy backdrop for spotting light scratches or a peeling screen protector, since fine marks and edges catch the light against solid black in a way they don’t against a busy desktop.

How to use it

1. Click Launch fullscreen above so the black fills your entire display, not just the browser window.
2. Sit at a normal viewing distance and scan the panel corner to corner: bright dots are dead or stuck pixels, faint glow near the edges is backlight bleed, patchy lighter areas are clouding.
3. On a laptop, tilt the screen slightly and re-check; some bleed and clouding only show up at an angle.
4. Press Esc to exit once you’ve checked the whole panel.

Do this in a dim room. Backlight bleed and stuck pixels are far easier to miss in a bright room than in low light.

Other uses for a black screen

Beyond testing, a black screen online is a simple, distraction-free background: a blank display for focus sessions, a quick way to darken a room using your screen instead of turning it off, or a temporary “screensaver” look while stepping away. It runs on the Fullscreen API built into modern browsers, so it works the same on a laptop, phone, or tablet with nothing to install. On OLED devices, running black for a stretch also draws less power than a bright display, since black pixels aren’t lit at all.

If you’re testing for other display issues, a White Screen shows the opposite problem: dead pixels and scratches that are easier to spot against solid white than solid black. For color-specific checks, Green Screen and Red Screen are useful too, red in particular for preserving night vision in a dark room. And if you want a softer, adjustable glow rather than pure black or white, Ambient Light or Custom Light give you more control over tone and brightness.

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