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Online alarm clock.
✓ 100% FREE — No Signup Needed
Set an alarm that rings right in your browser. No app to install, no signup — just pick a time and keep this tab open. Free, in every country.
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Set an alarm
Keep this tab open and your volume up. The alarm will not ring if the device sleeps or the tab closes.
How this alarm clock works
Your browser checks the real time every second. When the clock reaches one of your alarms, it plays a loud ringing sound and highlights the alarm in red. Press Stop to silence it, or Snooze for 5 more minutes.
Tips for a reliable wake-up
- Turn your device volume up and disable silent mode.
- Keep the laptop or phone plugged in and awake — disable auto-sleep.
- Do not close this tab. You can switch tabs; the alarm still rings.
- Test it first: set an alarm 1 minute ahead to hear the sound.
Alarm clock, explained
Will the alarm ring if I switch tabs?
Yes, as long as this page stays open in the browser. Keep the tab open and your device volume up — the alarm uses the browser's real-time clock, so it stays accurate even in a background tab.
Does the alarm work if my computer sleeps?
No. If your device goes to sleep or the browser is closed, the alarm cannot sound. Turn off sleep mode or keep the device awake until the alarm time.
Can I set multiple alarms?
Yes. Add as many alarms as you like — each one can be turned on or off and deleted individually.
Is this online alarm clock free?
Yes. It is 100% free with no signup and works in every country.