Online alarm clock
A big clock and an alarm that rings in this tab at the time you choose.
- 100% free
- No sign-up
- Runs in your browser
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No alarm set.
Keep this tab open, your sound on and your computer awake. The alarm rings in a background tab, but not if the tab is closed or the device sleeps. For a phone, your built-in clock app is more reliable.
Next: Online timer · Pomodoro timer · Time zone converter
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How to use Online alarm clock
Set the time
Pick the time for the alarm and add a label if you like, such as “Call Mum” or “Take the bread out”.
Choose a sound
Pick a bell, chime, beep or digital watch sound and click Test to check your volume.
Keep the tab open
Click Set alarm. When it rings, stop it or snooze it for 5 or 10 minutes.
Why use Utils365
Snooze built in
Snooze for 5 or 10 minutes with one click, or stop the alarm with the Space bar.
Big, clear clock
The current time in large digits, in your own 12- or 24-hour style, with full screen for a bedside or desk display.
Rings in a background tab
The alarm is timed from the clock itself, so it rings on time even when you’re working in another tab.
Remembers your alarm
Your last alarm time, label and sound are kept in this browser for next time.
Frequently asked questions
How do I set an alarm online?
Pick a time, choose a sound and click Set alarm. If that time has already passed today, the alarm rings at that time tomorrow.
Will the alarm ring if my computer is asleep?
No. A web page can’t wake a sleeping computer. Keep it awake and plugged in, with the tab open and the sound on.
Can I use it as an alarm on my phone?
Only with the screen on and the browser open. Phones pause web pages when locked, so your phone’s own clock app is better for waking up.
How does snooze work?
Click Snooze 5 min or Snooze 10 min when the alarm rings. It stops and rings again 5 or 10 minutes later.
Why is the clock in 12-hour or 24-hour format?
It follows the usual style for your language. English (US) shows 7:30 AM, while most of Europe shows 07:30.
Can I hear the sound before setting the alarm?
Yes. Choose a sound and click Test. If you hear nothing, check your volume and that the tab isn’t muted.