How to use the online alarm clock
If 10:51 pm is when you need to leave for work while everyone else is heading to bed, this tool sets a browser alarm that rings right through your speakers at 10:51 pm. No app, no account, just a tab that stays open until it fires.
Pick whichever sound you're most likely to actually notice, then press Start. The alarm is tied to this browser tab, so it needs to stay open. Minimising the window is fine, but closing the tab or the browser will stop the countdown before it ever rings.
Some people use this alongside a phone alarm rather than instead of it: a louder backup through laptop speakers, or a way to set a reminder without touching a phone at all. It won't survive the tab closing or the device sleeping, so for anything critical overnight, keep a second alarm running as well. On a 24-hour clock 10:51 pm is written 22:51, and spoken aloud it's nine minutes to eleven at night. Written the Australian way that's 10.51 pm, and typed in a hurry it's often 10:51pm. Set an alarm for 10:51 pm, set the alarm to 10:51 pm, set my alarm for 10:51 pm — all of it lands on this page and does the same thing.
Common questions
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.
What happens once the alarm goes off?
It rings through your device's speakers on a loop until you stop it from this page. There's no separate app notification, so make sure your volume is turned up before you rely on it.
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