Welcome to RNS Alarm
This free online alarm clock is a web tool that helps you wake up on time and set task reminders — all from your browser.
Just choose a time and click the button to set the alarm, then keep the browser tab open while you work in other tabs.
You can also use our online timer if you want the alarm to ring after a duration (not at a specific time),
or see the current time with our online clock.
How to Set an Online Alarm
- Check that the digital clock on the page matches your local time.
- Set the alarm time in hours and minutes, or click a pre-set alarm time.
- Optionally, set an alarm sound and alarm name (like "Break time").
- Click Set an Alarm to activate the alarm clock.
Once you set the alarm, the screen changes to a countdown timer. The countdown shows how much time remains and the time the alarm will ring.
While the alarm is counting down, you can:
- Full-screen mode: Click the full-screen icon (top right) to display the countdown in full-screen mode. Press Esc to exit.
- Dark mode display: Click the bulb icon to open a completely dark full-screen display. The alarm will sound but the screen stays dark. Press Esc to exit.
- Stop: Click Stop to cancel the alarm before it goes off.
When the alarm goes off:
- Click Stop to end the alarm.
- Click Snooze to delay it for 10 minutes.
To set multiple alarms, open another tab and repeat the steps above.
Alarm Clock Settings
Click the gear icon in the top right corner to change the settings:
- Enable / disable dark mode
- Enable / disable repeat alarm sound (loop)
- Show / hide the alarm time and progress bar
- Change the default snooze duration
- Adjust the alarm volume
Frequently Asked Questions