Online Alarm Clock

Set an alarm for any local time, name it if you like, and watch the remaining time count down from your device clock. Keep the page open and test its sound: the alarm plays at the selected time when the browser is running and permitted to use audio.

00:00:00

Ring at

Rings at the time you set, anchored to your device clock. Keep the tab open and your volume on.

About the Online Alarm Clock

In short

Set the browser alarm for a clock time today or tomorrow, and keep the tab open with device audio enabled.

An online alarm clock alerts at a specific local clock time. That differs from a countdown timer, which starts with a duration, and a date countdown, which displays the days and hours remaining to a future event.

The alarm uses the time zone and clock on this device. Check both before relying on it, especially after travel or a daylight-saving change, and keep the browser tab open so it can play the selected sound.

Choose the right timing tool

You know	Use
The clock time: 07:30	Alarm Clock
The duration: 25 minutes	Online Timer
The future date and time	Date Countdown

Tip: Confirm whether the selected time is today or tomorrow.

Tip: Test the alarm after changing sound or volume.

Tip: Disable silent mode and keep the device powered.

Browser alarm limitations

A web page cannot guarantee audio after the browser is closed, the device is powered off or the operating system suspends it. Test the sound and volume first. For waking up, medication, travel departures or another high-stakes alert, set a native device alarm as a backup.

How to Use the Online Alarm Clock

Pick a timeChoose the time you want the alarm to go off, like 7:00 AM or 3:30 PM.
Name it (optional)Add a label such as 'Wake up' or 'Meeting' so you know what it is for.
Set the alarmPress Set alarm and it counts down to the time, showing how long is left.
Hear it ringAt the set time a clear alarm sounds and the screen flashes. It works full-screen too.

Related on timer.now: countdown to a date, sleep timer and Pomodoro timer.

Browse all online timer tools by activity and timer type.

For audible alerts, keep the page open and test the sound. Browser alarm limits.

Best Uses for the Online Alarm Clock

Visible-page reminder

A browser alarm for a selected time when the page remains open and active.

Meetings & appointments

A nudge before a call, class or appointment.

Cooking & oven

An alarm for the time a dish needs to come out.

Breaks & reminders

Set a time to stop, stretch or switch tasks.

Online Alarm Clock Compared With Similar Timers

Tool	Choose it when
Online Timer	you need an alert after a fixed duration
Date Countdown	you want to watch the days and hours to an event

Related Online Timers

1 minute 2 minutes 3 minutes 5 minutes 10 minutes 15 minutes 20 minutes 25 minutes 30 minutes 45 minutes 50 minutes 1 hour 2 hours 30 sec 10 sec 20 sec

Online Alarm Clock - FAQ

How do I set an alarm for a specific time?

Pick the hour and minute with the time picker and press Set alarm. It counts down to that time and rings when it arrives.

Will the alarm ring if the tab is in the background?

The display recalculates from the selected alarm time when the page runs again, but background audio is not guaranteed. Keep the tab open, test the sound and check device volume.

What is the difference from a timer?

A timer counts down a length of time, like 10 minutes. An alarm clock rings at a specific time of day, such as 7:00 AM. Need a duration instead? Use the countdown timer.

Will the online alarm work if I close the browser?

No guarantee. Keep the tab open and use a native alarm as a backup whenever missing the alert would matter.

Does the alarm use my local time?

Yes. It follows the clock and time zone reported by the device running the page.

Want a timer on your own page? Build an iframe embed with a custom title, theme and dimensions.