Set the alarm clock for 3:46 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 3:44 am Alarm clock for 3:45 am Alarm clock for 3:47 am Alarm clock for 3:48 am

Going to bed for a 3:46 am alarm

Asleep by 6:31 pm — 6 full sleep cycles, about 9 hours
Asleep by 8:01 pm — 5 full sleep cycles, about 7 hours
Asleep by 9:31 pm — 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.

3:46 am across the country

Sydney	3:46 am
Brisbane	3:46 am
Adelaide	3:16 am
Perth	1:46 am
Darwin	3:16 am

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

How to use the online alarm clock

Tradies, nurses on night shift, and anyone driving to the airport before the birds wake up all end up here around 3:46 am. This alarm rings straight from your browser tab at 3:46 am, loud enough to cut through a quiet house, without needing an app or an account first.

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.

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 3:46 am is written 03:46, and spoken aloud it's fourteen minutes to four at night. Timetables and rosters may show it as 03:46, and handwritten notes as 3.46 am. Set an alarm for 3:46 am, set the alarm to 3:46 am, set my alarm for 3:46 am — all of it lands on this page and does the same thing.

Common questions

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.

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.