How to use the online alarm clock
Study sessions, evening training, or a reminder to log off before the night gets away from you: 9:43 pm works well as an evening checkpoint. This rings straight from your browser at 9:43 pm, and keeps ringing until you stop it. No app required.
Set your preferred sound, press Start, then leave the tab where it is. Everything happens inside the browser — no background app, no notification pushed from a server — so an open tab is what actually makes the alarm ring at the right time.
It's free to use, doesn't need an account, and works the same in any modern browser, but it's honestly not meant to replace your phone for anything you can't afford to sleep through. Keep the tab open and the device awake, and it'll ring reliably at the time you set. On a 24-hour clock 9:43 pm is written 21:43, and spoken aloud it's seventeen minutes to ten at night. Timetables and rosters may show it as 21:43, and handwritten notes as 9.43 pm. Whether you would say set alarm for 9:43 pm or put an alarm on for 9:43 pm, the steps are the same: pick a sound, press Start, leave the tab open.
Common questions
Will the alarm still ring if I close the browser tab?
No. The alarm only runs while this tab stays open — closing it, or closing the browser entirely, stops the countdown before it can ring. Keep the tab open in the background if you need it to go off later.
Does the alarm work if my laptop goes to sleep?
Not reliably. If the device sleeps or the screen locks, the browser tab pauses along with it, so the alarm may not fire on time or at all. Adjust your power settings if you're relying on this over a longer stretch.
Do I need to create an account or download anything?
No, there's nothing to sign up for and nothing to install. Pick a time and a sound, press Start, and it runs entirely in this browser tab.
Can I change the alarm sound?
Yes, there's a short list of tones to choose from before you press Start. Pick whichever one you're most likely to actually hear — softer sounds are easier to sleep through than a firm chime or bell.
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