Free tool
Online Alarm Clock
Set a free alarm in your browser – choose a sound, add a label, snooze, or set the alarm by the time in another city.
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No alarm set
⏰ Alarm
Keep this tab open and your volume up. Alarms are saved on this device. On phones, the screen must stay on for the sound to play.
How to use the online alarm clock
- Pick the alarm time and a sound – press Test to check the volume.
- Optional: choose another time zone to set an alarm by another city’s clock (handy for calls and live events abroad).
- Press Set alarm. You can set several alarms; each rings once at its next occurrence.
Frequently asked questions
Will the alarm work if I close the tab?
No. The alarm runs in your browser, so this page must stay open (it can be in a background tab). Make sure your computer won’t go to sleep.
Can I set an alarm for a time in another country?
Yes – choose the time zone next to the alarm time. For example, set 9:00 New York time and the alarm rings at the matching local time wherever you are.
More free time tools
All tools →My World ClockYour own multi-city clock board.Online TimerCountdown timer with alarm.Online StopwatchStopwatch with lap times.Countdown TimerCountdowns to holidays and your own events.Clock Widget for WebsitesEmbed a live clock on your site.Time Zone ConverterConvert a time between any cities.Time Difference CalculatorHours between any two cities.Meeting PlannerFind meeting times that suit every city.