Online Alarm Clock
Set one or many alarms that ring right in your browser. Saved automatically — they're still here when you come back.
Add a new alarm
Keep this tab open for alarms to ring. Tap "Add" once to enable browser notifications.
How the online alarm clock works
iAlarmClock runs entirely in your browser. When you add an alarm, the time and label are saved to your device's local storage — nothing is uploaded to any server. While the tab stays open, the page checks the time every few seconds and rings when an alarm is due.
Tips for reliable alarms
- Keep the tab open and the device unmuted.
- Allow notifications when prompted — they'll fire even if the tab is in the background.
- Plug in your device for long delays so it doesn't sleep.
- Set a backup phone alarm for anything critical. Browsers can suspend background tabs after long idle periods.
Multiple alarms
Add as many as you like — each with its own label. Toggle individual alarms on or off without deleting them. Useful for split-shift schedules, medication reminders, or layered wake-ups (a "soft" alarm at 6:30 and a "for real this time" at 6:45).
Privacy
Your alarms live in your browser, not on our servers. Clearing your browser data will remove them. No account, no email, no tracking of your alarm contents.