Set the alarm clock for 4:45 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 4:43 am Alarm clock for 4:44 am Alarm clock for 4:46 am Alarm clock for 4:47 am

Going to bed for a 4:45 am alarm

Asleep by 7:30 pm — 6 full sleep cycles, about 9 hours
Asleep by 9:00 pm — 5 full sleep cycles, about 7 hours
Asleep by 10:30 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.

4:45 am across the country

Sydney	4:45 am
Brisbane	4:45 am
Adelaide	4:15 am
Perth	2:45 am
Darwin	4:15 am

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

Online alarm clock for 4:45 am

You have only just woken at 4:45 am, with an eastbound flight across Australia still ahead and overnight check-in waiting. Before bags, documents or transport enter the picture, this alarm gives you a clear starting point. There is a useful quarter-hour before 5:00 am to shake off sleep, check the departure details and work out what must happen first.

Your flight schedule may depend on a phone or laptop that normally dims and sleeps after a short idle period. Keep the browser alarm visible, connect the device to power and adjust its sleep settings so it remains awake until the sound is due. If the browser is closed or the device falls asleep beforehand, the alarm will not sound, and the flight check-in may begin while you are still asleep. A separate phone alarm adds sensible backup for a departure with little room for delay.

Stepping outside for the trip to the airport can feel different from the air indoors, especially at 4:45 am when humidity may be noticeable and the night is still dark. Check the local conditions before leaving, allow a moment for a fogged windscreen to clear, and keep a light layer within reach for the walk from home to the car or pickup point.

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.