How to use the online alarm clock
If the evening is when you get things done — an assignment, a load of washing, dinner prep — 8:21 pm is a sensible time to set a firm reminder. This tool rings at 8:21 pm through your laptop or desktop speakers, whether the tab's open on the kitchen bench or the desk.
Using it is simple: pick a ringtone from the list, press Start, and leave this tab open in your browser. The alarm runs entirely on this page, so closing the browser will stop it from going off. Come back a minute early if you're not sure you trust it yet.
Compared to a phone, this alarm has one job and nothing else competing for attention — no messages, no app switching. It's free and doesn't ask for sign-up, but it only works while the tab is open and the device stays awake, so it suits daytime use at a desk better than an overnight bedroom alarm. On a 24-hour clock 8:21 pm is written 20:21, and spoken aloud it's twenty-one minutes past eight in the evening. You'll also see it written 8.21 pm — a full stop instead of the colon means the same time. Whether you would say set alarm for 8:21 pm or put an alarm on for 8:21 pm, the steps are the same: pick a sound, press Start, leave the tab open.
Common questions
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.
Is there a cost to use this?
No, it's free, with no sign-up and no limit on how many times you set it. It just needs the tab left open until the time you've chosen arrives.
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.
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