Keep Awake
Prevent your laptop or phone from sleeping. Pick a duration or stay awake indefinitely. Runs on your device — nothing is uploaded, nothing is stored.
How it works
Uses the browser's Wake Lock API to keep your display on — works on Mac, Windows, Linux, iOS and Android without installing anything. Keep this tab visible; closing or minimizing it releases the lock.
If you close the laptop lid, the OS may still sleep — this only prevents display timeout while the tab is visible.
Create interactive mind maps. Add nodes, connect ideas, color branches, and export as JSON or PNG.
Draw or type your signature and download it as a transparent PNG or SVG. Adjustable pen color and thickness, handwriting fonts, fully client-side.
Generate random numbers, roll dice, flip a coin, or pick a random winner from a list.
Prevent your laptop or phone from sleeping. Pick a duration or stay awake indefinitely.
Keep Awake is a browser-native productivity utility that works the moment the page finishes loading — no account, no email form, no "upgrade to Pro" wall, no watermark on the output. Everything happens inside your own browser tab: the file you drop in is read into local memory, processed there, and handed back as a download. It never travels across the internet, never lands on anyone's server, and nothing about it is stored or logged on our end.
That matters more than it sounds. Most online productivity tools either queue you behind other users on a shared backend, cap the file size to force you onto a paid plan, slap a watermark on the result, or (worst of all) keep your upload around "for analytics". Keep Awake skips all of that because there is no server to queue on, cap, charge for, or compromise. Your own device does the work, so the only limits are your hardware's and your patience.
It also keeps working with your Wi-Fi turned off. Load the page once, then the tool runs offline — handy on a flight, in a hotel with hostile Wi-Fi, or inside a corporate network where you don't want to involve an outside service in the first place.