What is Online Alarm Clock?
Online Alarm Clock turns your browser into an alarm. Set a time, add an optional label like “Meeting” or “Take medicine”, choose a sound, and the alarm rings at that time with a snooze option. Add as many alarms as you like — they’re saved in your browser for next time.
It’s handy for reminders while you work at your computer, naps, and meetings. Because browsers can’t wake a sleeping device, keep the tab open, the device awake and the volume up.
How to use Online Alarm Clock
Get it done in 4 simple steps — no installation or account needed.
- Choose the alarm time and, optionally, a label and sound.
- Click “Set alarm”. It appears in your list with the time remaining.
- Keep this tab open and your volume up.
- When it rings, press Stop or Snooze for 5 minutes.
Limitations & supported browsers
Works in the latest Chrome, Edge, Firefox, Safari (Mac, iPhone and iPad) and Samsung Internet. Because processing happens on your device, speed and maximum file size depend on your device’s memory.
- Browsers can’t wake a sleeping or locked device. Keep the tab open, the device awake and the volume up.
- Alarms are saved in this browser only; they don’t sync to other devices.
Who needs Online Alarm Clock?
From students to professionals, here’s who gets the most out of Online Alarm Clock — and why.
Remote workers
Get reminded about meetings and breaks while at the computer.
Students
Set study and break alarms during long sessions.
Nappers
Take a short power nap without oversleeping.
Caregivers
Set reminders for medicine and routines.
Is Online Alarm Clock safe to use?
Yes. Online Alarm Clock runs entirely in your web browser using JavaScript. Your files and data are processed on your own device and are never uploaded to AppsOcean or any third-party server. There’s nothing to install, no account to create, and it’s completely free.Read our privacy policy.
Online Alarm Clock — frequently asked questions
Will the alarm ring if I close the tab?
No — the page must stay open. You can switch to other tabs, but don’t close this one.
Are my alarms saved?
Yes, in your browser on this device, so they’re still there when you come back.
Does the alarm work if my computer sleeps?
No. Browsers can’t wake a sleeping device, so keep your computer or phone awake, the tab open and the volume up. For critical alarms, use your phone’s built-in alarm too.
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