Set a browser alarm for any time. Rings even when you switch tabs.
Free Online Alarm Clock
Set an alarm right in your browser — no app download needed. Enter the time you want the alarm to ring, choose a sound, and click Set Alarm. The alarm will trigger even if you switch to another tab, as long as the browser window stays open.
How to Set the Online Alarm
Use the time picker to set your desired alarm time, choose your preferred alert sound, optionally enable browser notifications, and press Set Alarm. The current time is displayed so you can easily set the alarm relative to now. Press Cancel Alarm to turn it off.
Frequently Asked Questions
Will the alarm work if I switch tabs?
Yes. The alarm runs as a background interval and will trigger even if you switch to another tab, as long as you don't close the browser window or tab.
Can I set an alarm for tomorrow?
The alarm clock sets a time for today. If the time you enter has already passed today, it will ring at that time tomorrow.
Does this alarm work on mobile?
Yes, it works on iOS and Android browsers. Keep the browser tab open and your device screen on (or enable browser notifications) for reliable alerts.