Online Alarm Clock
Set one or more alarms for a time of day, on chosen days of the week or just once. When the time comes the alarm rings until you stop it or snooze it, even if you are working in another tab. Keep this page open and your computer awake.
New alarm
No alarms yet.
Sound and snooze
The alarm only rings while this page is open and the device is awake.
How to use it
- Pick the time, or tap a button like +20 min for a quick alarm.
- Choose the days to repeat (none means only once), give it a name if you like and click Set alarm.
- Leave the page open. When it rings, click Stop or Snooze; the switch turns an alarm off without deleting it.
Frequently asked questions
Will the alarm ring if I close the tab or the computer sleeps?
No. A web page cannot wake a closed browser or a sleeping computer. If the computer wakes up less than an hour after the alarm time, it rings then; otherwise the page shows it as missed. For important alarms, keep the page open and the computer awake.
Does it work in a background tab?
Yes. The sound is scheduled in the browser's audio clock as soon as you set the alarm, so it rings on time even when you are using another tab. On phones, keep the page in front and turn on Keep the screen on, because mobile browsers pause pages in the background.
Why do I have to click the page before the alarm can make a sound?
Browsers block sound from pages you have not interacted with. Setting an alarm counts as a click; if you reopen the page later, click anywhere once and your saved alarms will ring with sound.