Turn your screen pitch black instantly and prevent device sleep. No app needed — runs in any browser.
無料で使う →Tap once to go pure black — no configuration needed.
Uses Screen Wake Lock API to keep your screen on while black.
Works great on phones, tablets, and computers with touch or click.
Automatically enters fullscreen for a completely dark experience.
No account, no install, no ads interrupting your black screen.
Everything runs in your browser — no data leaves your device.
Visit the Black Screen page in any modern browser.
Click or tap the large black circle button to enter black screen mode.
Tap or click anywhere on the black screen to return to normal.