Use it right here in your browser — no download needed. Works in Chrome, Edge, and Safari. Completely free.
Keep this tab open · Works in Chrome, Edge, Safari · Free
Zzz sends a single harmless keypress every few minutes — the same trick as classic tools like Caffeine — so your machine thinks you're still there.
No sleep, no dimming, no screensaver, no idle screen lock — for as long as you leave it on.
Hit the button to toggle. The dot turns blue when it's keeping you awake, grey when it's off.
Pick how often it nudges — roughly every 2, 3–4, or 5 minutes. A little randomness keeps it natural.
Visit zzz-app.com from any modern browser — Chrome, Edge, or Safari. No download, no account, no install.
Hit the button and the browser requests a Screen Wake Lock. The dot turns blue when it's active.
Your screen stays awake as long as this tab is open and visible. Click Stop (or close the tab) to turn it off.
Zzz is free and always will be. If it keeps your screen awake when you need it, you can help the developer sleep a little easier.
Support Zzz