Set the alarm clock for 9:33 am

Leave this tab open — the alarm only rings while the tab stays open.

The alarm goes off in: ::

You can also try the other alarm clocks

Alarm clock for 9:31 am Alarm clock for 9:32 am Alarm clock for 9:34 am Alarm clock for 9:35 am

Going to bed for a 9:33 am alarm

Asleep by 12:18 am — 6 full sleep cycles, about 9 hours
Asleep by 1:48 am — 5 full sleep cycles, about 7 hours
Asleep by 3:18 am — 4 full sleep cycles, about 6 hours

A sleep cycle runs about 90 minutes, and most people take around 15 minutes to drop off. Waking at the end of a cycle feels easier than waking in the middle of one.

9:33 am across the country

Sydney	9:33 am
Brisbane	9:33 am
Adelaide	9:03 am
Perth	7:33 am
Darwin	9:03 am

Times are worked out live in your browser, so daylight saving is already accounted for.

How to use the online alarm clock

Getting out the door for the school run or the commute into the city gets easier when 9:33 am is locked in properly. Choose a sound, hit start, and this browser alarm will ring at 9:33 am whether you're upstairs making lunches or still half asleep. Just keep the tab open so it has a chance to go off.

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.

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 9:33 am is written 09:33, and spoken aloud it's twenty-seven minutes to ten in the morning. You'll also see it written 9.33 am — a full stop instead of the colon means the same time. If you need it loud, turn the system volume up before you start: the alarm plays at whatever the device is set to.

Common questions

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.

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.