Keep your screen on straight from the browser. Press Start and your display stays awake while the tab is visible — no extension, no install.
Ready. Choose a duration and press Start.
A browser wake lock is a way for a web page to ask the operating system to keep the display awake. Modern browsers expose this through the Screen Wake Lock API, and this page uses it directly.
Because it runs in the browser, there is nothing to install: open the page, choose how long you need, and start. The lock is released automatically when you stop or close the tab.
Works in the browser with no extension or app.
Same tool on Windows, Mac, Android, and ChromeOS.
Keep it on until you stop, or set a timer.
Built on the official Screen Wake Lock API.
Chrome, Edge, Opera, and most Chromium browsers support it; Safari support has improved on recent versions.
No. The page must stay visible. When the tab is hidden the browser releases the lock.
It targets the display through the browser; full system sleep still depends on OS settings.