Full Black Screen
Fill your whole screen with pure black — perfect for spotting bright stuck pixels, checking backlight bleed or as a distraction-free dark backdrop. Free.
Pick a color
Press Esc to exit, or use the ← → arrow keys to switch colors while in full screen.
What is it for?
About Full Black Screen
The Full Black Screen tool fills your entire display with pure black (#000000). It is the standard test for stuck pixels — sub-pixels frozen in the on state glow as tiny bright red, green, blue or white dots against the dark field — and for judging how deep your panel’s blacks really are.
On LCD monitors, a black screen is the definitive backlight bleed test: in a dim room, uneven light leaking from the edges and corners becomes plainly visible. On OLED displays, where each pixel emits its own light, a true black screen should be indistinguishable from the panel being off.
Beyond testing, a pitch-black page makes a distraction-free backdrop: an ambient dark screen for a second monitor, a neutral background behind on-camera subjects, or simply the fastest way to blank a display without powering it off. It is free, browser-only, and exits with Esc.
How to use Full Black Screen
- Click the monitor preview or "Go full screen" to blacken the entire display.
- Dim the room lights for the most revealing test conditions.
- Look for bright dots (stuck pixels) and for light leaking from edges and corners (backlight bleed).
- Cycle to the other test colors with the ← → arrow keys, or press Esc to exit.