How to use the online alarm clock
If the evening is when you get things done — an assignment, a load of washing, dinner prep — 9:10 pm is a sensible time to set a firm reminder. This tool rings at 9:10 pm through your laptop or desktop speakers, whether the tab's open on the kitchen bench or the desk.
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.
Because this runs in the browser rather than on the phone's operating system, it sidesteps silent mode and do-not-disturb entirely, useful if your phone alarm has ever failed to go off for exactly that reason. Just be aware it needs the tab open and the screen or laptop lid to stay on to actually ring. On a 24-hour clock 9:10 pm is written 21:10, and spoken aloud it's ten past nine at night. You'll also see it written 9.10 pm — a full stop instead of the colon means the same time. Set an alarm for 9:10 pm, set the alarm to 9:10 pm, set my alarm for 9:10 pm — all of it lands on this page and does the same thing.
Common questions
Is this alarm accurate across daylight saving time?
It uses your device's local clock, so as long as your computer's time and date settings are correct, it'll adjust automatically when daylight saving time starts or ends.
Can I use this on my phone instead of a laptop?
Yes, it works in a mobile browser the same way, but phones are more likely to lock the screen or sleep, which can stop the alarm from ringing. A laptop or desktop tends to be more reliable for this.
Can I set more than one alarm at a time?
This page is built around a single alarm at a time. For multiple alarms, open a separate tab for each one and set a different time in each, keeping every tab open until it's rung.
Why use a browser alarm instead of my phone's built-in one?
Mainly for reliability against silent mode, do-not-disturb, or a phone left charging out of earshot. It's a useful backup or a desk-based alternative, though it depends on this tab staying open rather than running in the background of your phone.
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