Just dropped in r/PromptEngineering: a tiny tool called Keep Screen On (keepscreenon.dev). You open the site, flip it on, and your computer stays awake while you step away. No install, no account, no setup. Yesterday a clever little build shipped, and the twist is not the one you’d expect.
The builder made it because long jobs kept dying when Windows went to sleep. Think AI agents running a task, long builds, big downloads, rendering, data processing. Anyone who has come back to a half-finished export and a dark screen knows that sinking feeling. You lose the progress, you lose the time, and sometimes you lose the whole run because the process cannot resume from where it stopped.
What’s new
It’s a browser-based keep-awake switch. You don’t touch your system power settings. The tool keeps the screen active, so the machine doesn’t doze off mid-job. The post doesn’t say how it does this. My guess is the browser’s Screen Wake Lock feature, but that’s a guess, so check the site before you rely on it.
What makes this appealing is how little friction it adds. There’s nothing to download, nothing to approve with an admin, and nothing left behind on the machine when you close the tab. For people who bounce between a home desktop, a work laptop and a borrowed computer, a bookmark is far easier to carry around than a custom power plan.
The twist
The twist isn’t in the tool. It’s in the comments. The thread was blunt: Windows already does this. Several people pointed to the sleep setting under Power & Sleep, where you can set sleep to “Never”. Another suggested a black screen saver or turning off just the monitor, so the screen goes dark while the PC keeps working.
They have a fair point. If your PC is yours and you can change its settings, the built-in option is the cleaner fix. The post scored 0 and the replies were not gentle. Still, I like when a thread teaches you the boring answer you were about to overlook. Even if you never open keepscreenon.dev, you walk away knowing where the real setting lives.
So where does a browser tab actually earn its spot? Mostly on machines where you can’t or don’t want to touch the settings: a work laptop with locked-down policies, a borrowed computer, or a one-off job where you’d forget to switch the setting back afterward. A good example is a client’s machine during a screen share or a long upload. You don’t want to leave their power plan changed, and a closed tab leaves no trace.
Mini-workflow: pick the right keep-awake method 🛠️
- Ask whether you control the PC’s settings. If yes, go to Settings > System > Power & Sleep and set sleep to Never for the job. ⚙️
- If you only want the screen dark, set the display to turn off but leave sleep on Never. Your job keeps running, the monitor rests.
- If settings are locked or you’re on a shared machine, try a browser tool like Keep Screen On. Open it, turn it on, leave the tab open. 🌐
- Start your long task and check after a few minutes that the screen is still awake before you walk away.
- When the job finishes, turn the tool off or restore your original setting. 🔙
Pro tips
- Test before you trust it. Run it for ten minutes while you stay nearby, then go for the long stretch. Set your normal sleep timer to a short value first, like two minutes, so you can see the tool working instead of guessing.
- A browser-based trick usually needs the tab to stay open. Closing it or letting it get discarded can end the effect, so pin it. Also keep the browser from minimizing into a power-saving mode, since some browsers pause background tabs to save battery.
- If you set sleep to Never on your own machine, leave yourself a reminder to switch it back. Laptops on battery will happily drain overnight. Plugging into power for any long job is a simple habit that avoids a dead machine at 3 a.m.
- For AI agents specifically, a keep-awake tool only solves the sleep problem. If the agent needs a network connection, make sure that stays up too. Wi-Fi adapters can also power down on their own, so check that your connection settings don’t cut the link when the screen is idle.
- Save checkpoints when you can. Even with the best keep-awake setup, a Windows update or a power cut can still interrupt things, and a saved midpoint turns a disaster into a small delay.
Call to action
The builder asked a good question: what situations make you wish your computer would just stay awake? I’d add a second one: do you reach for the built-in setting or a quick tool? Try the settings route first, and if you’re stuck on a locked machine, give keepscreenon.dev a look and tell me how it held up. 🏴☠
Frequently Asked Questions
Q: Why would I use this instead of just changing Windows power settings?
Windows Power Management works great for permanent changes. This tool is useful if you frequently toggle sleep prevention on/off for different tasks, start an AI agent, enable sleep here, then disable when done. No need to navigate system settings each time.
Q: Can’t I just use PowerShell or a batch script?
Absolutely, and that’s a solid option for technical users. This tool prioritizes simplicity, open a browser, click one button, and your PC stays awake. No setup, scripting, or command-line knowledge needed.
Q: When would I actually toggle this frequently instead of just changing Windows settings once?
If you run AI agents, long builds, rendering tasks, or large downloads while stepping away, you might want to prevent sleep just for that session. Once done, you’re back to normal without remembering to change Windows settings again. It’s also handy for shared computers or temporary situations where you don’t want to permanently adjust system settings.
Q: Is this the same as a screensaver?
Not exactly. Screensavers let the display go black but can still trigger sleep mode afterward. This tool keeps the screen active (it prevents Windows from entering sleep mode entirely), so your long-running tasks won’t get interrupted.
A simple way to stop your PC from going to sleep
by u/No-Aide7224 in PromptEngineering