Black screen
Fill your entire screen with pure black — to reveal stuck pixels and backlight bleed, check OLED blacks, or blank a display. Click or press Esc to exit.
Black screen FAQ
- What is a full black screen used for?
- It's the revealing half of most screen checks: stuck pixels glow as bright dots against black, backlight bleed shows up as light leaking from the edges, and on an OLED a black field shows whether pixels truly switch off. It's also a quick way to visually blank a screen during a presentation.
- I see light patches around the edges — is my monitor broken?
- Probably not. Nearly every LCD leaks a little backlight at the edges, and IPS panels add a silvery glow that moves with your viewing angle. It only matters if it's distracting in normal use. Our backlight bleed test walks through telling bleed and glow apart.
- Why isn't my black screen completely black?
- On an LCD the backlight stays on behind the pixels, so 'black' is really a very dark gray — obvious in a dark room. OLED and some mini-LED displays can switch zones or pixels off entirely, which is why their blacks look bottomless in comparison.