Black screenの使い方
- 1
Open it full screen
Press Open black screen, click the preview or press F. The pointer and the control bar vanish after two seconds without movement.
- 2
Choose true black or a near-black step
Keep true black for OLED and dark-room checks, or press the up arrow to lift it to 1–5 % and see whether your panel still separates those shades.
- 3
Decide whether the display may sleep
Keep screen on is off by default. Switch it on for a blank but awake display, and set a sleep timer if it should close by itself.
- 4
Leave with Esc
Press Esc, F or the exit button in the control bar. On a phone, tap once to bring the bar back first.
制限と Pro
Free with no sign-up: open the black screen as often and for as long as you like, use a sleep timer of up to 60 minutes, and download PNG images up to 16,384 × 16,384 pixels.
Pro removes the ads from the page; the black screen and its downloads have no limits to lift. Pro を見る
Black screen について
This page fills the whole display with pure #000000 and hides the mouse pointer and the control bar two seconds after you stop moving, so nothing else stays lit. On an OLED or micro-LED panel every pixel is then switched off: the screen looks as dark as when it is powered down, yet it is awake and ready.
That darkness has several uses. In a dark room it reveals backlight bleed and IPS glow on LCD monitors and laptops, which is worth checking while a shop's return window is still open. Glowing stuck or hot pixels stand out at once, and smudges on the glass show up when a lamp shines across it at an angle. It can also blank a second monitor during a film, give you a dark display while you fall asleep or meditate, or hide your desktop while a stream or a talk is paused.
The black level slider lifts the fill to 1–5 % grey (RGB 3 to 13). If those steps look identical to true black, the panel or its picture settings are crushing shadow detail. A sleep timer closes the screen after 5 to 60 minutes, and you can save a solid black PNG, JPG or WebP from Full HD to 8K, or any custom size up to 16,384 pixels per side.
What it cannot do: repair a display, cure a computer that boots to a black screen, or switch off an LCD backlight. On an LCD, black still glows faintly and draws about as much power as white.
プライバシー
The black fill is drawn by the page itself and the black images are generated inside your browser, so nothing is uploaded or sent to a server. Your black level, keep-awake and sleep timer choices are remembered in this browser's local storage only.
主な機能
True #000000 black
Every OLED pixel off, with the pointer and controls gone after two seconds of stillness.
Near-black steps
Lift the fill to 1–5 % grey to find out whether shadow detail is being crushed.
Sleep timer
Closes the black screen after 5 to 60 minutes so the display can go to sleep.
Black image download
A solid black PNG, JPG or WebP from Full HD to 8K, or a custom size.