Set the alarm clock for 10:09 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 10:07 am Alarm clock for 10:08 am Alarm clock for 10:10 am Alarm clock for 10:11 am

Going to bed for a 10:09 am alarm

Asleep by 12:54 am — 6 full sleep cycles, about 9 hours
Asleep by 2:24 am — 5 full sleep cycles, about 7 hours
Asleep by 3:54 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.

10:09 am across the country

Sydney	10:09 am
Brisbane	10:09 am
Adelaide	9:39 am
Perth	8:09 am
Darwin	9:39 am

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

How to use the online alarm clock

Some people set this for 10:09 am because their phone alarm gets silenced by early notifications; others just want a second, louder reminder. Either way, pick 10:09 am, choose a sound, press start, and leave the tab open. It'll ring at 10:09 am until you close it or hit stop.

After picking a tone, press Start and leave the page open. It doesn't need an internet connection once it's running, but it does need the tab itself to stay open, so avoid closing the browser or letting the device fall asleep before the time is reached.

This works well as a second alarm, one that isn't tangled up with phone notifications, do-not-disturb settings, or low battery. It genuinely won't ring if the tab gets closed or the device goes to sleep, so treat it as a backup or a work-desk tool rather than the only alarm for something important. On a 24-hour clock 10:09 am is written 10:09, and spoken aloud it's nine minutes past ten in the morning. Timetables and rosters may show it as 10:09, and handwritten notes as 10.09 am. Set an alarm for 10:09 am, set the alarm to 10:09 am, set my alarm for 10:09 am — all of it lands on this page and does the same thing.

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.