Keep Screen On

Prevent your display from dimming or going to sleep while this tab stays visible. Built for long-running sessions — for example, watching an AI agent work in loop mode.

This browser does not support the Screen Wake Lock API. A hidden silent looping video will be used as a fallback.

Click to activate

00:00:00

Waiting to start

Keep this tab visible — the lock is released when the tab is hidden or minimized.
Keeping the screen awake increases battery usage on laptops and phones.
Locking the screen manually always wins — a web page cannot prevent it.

How it works

The page requests a screen wake lock via the Screen Wake Lock API: while it is held, the operating system will not dim or turn off the display. Browsers release the lock when the tab is hidden, so it is re-acquired automatically once the tab is visible again.

If the browser does not support the API (for example, Firefox), a tiny silent looping video keeps the display awake instead. This is also handy when an AI agent runs long tasks in a terminal nearby and the screen must stay on.

On a computer, native tools are more effective than a web page — they keep the display awake even with no browser open:

macOS: caffeinate — keep the Mac awake straight from the terminal
Linux: systemd-inhibit — blocks system suspend while a command runs
Windows: PowerToys Awake — keeps the screen on without changing power settings

MDN: Screen Wake Lock API