Black Screen
A full screen of pure black. Good for dark rooms, sleep and checking a screen.
Quick answer: Press Full screen to fill your display with black. On OLED screens this turns the pixels off, and it also shows backlight bleed on LCD screens.
Press F for full screen, Esc to leave. In a series, tap, press Space or use the arrow keys for the next colour.
Very bright full screens can be uncomfortable in a dark room. Do not look at them for long, and do not use them as a warning light on the road or a safety lamp.
How to use it
- Press Full screen or tap the black area.
- Tap to change to gray or white.
- Press Esc to leave.
What a black screen is good for
- Showing backlight bleed and stuck pixels in a dark room.
- Watching a video or a projector with a dark surround.
- A plain background for a screen recording or a photo.
- Keeping the room dark while a laptop stays awake.
On an LCD, black is still lit from behind, so the screen is not fully dark. On an OLED screen, black pixels are off.
What people use it for
- Backlight bleed checks
- Dark background for video
- Saving power on OLED
- Photography backgrounds
Questions
Will a black screen save battery?
On OLED screens, yes, because black pixels are off. On LCD screens, little changes.
Does a black screen turn the display off?
No. The device stays on and may still dim or sleep by its normal settings.
How do I check for backlight bleed?
Show black in a dark room and look for pale patches near the edges.
Is it free?
Yes. No sign-up, no install and no limit.
Is anything saved or sent?
No. Everything runs in your browser. Only your own best score, where a page shows one, is kept on your device.
Last updated 2026-10-24. Free to use, no sign-up. Made by ficklestudio26.