What Is an Online Alarm Clock?
An online alarm clock is a simple digital alarm that works directly in your web browser. No download or app is required just set the time, keep the tab open, and the alarm will ring at the chosen moment. You can use it on any computer, laptop, tablet, or smartphone.
This tool is useful for waking up in the morning, study sessions, cooking timers, workouts, meditation, or exam practice.
How to Set an Alarm Online
Setting an alarm with our online alarm clock is quick and easy:
- Choose the time - Select the exact hour and minute you want the alarm to ring.
- Pick a sound - Select from different alarm tones (optional).
- Add a Name - Write a reminder or note that will appear when the alarm rings (optional).
- Start the alarm - Click Set Alarm, and a countdown will show until it goes off.
👉 You can set multiple alarms by opening new tabs and repeating the steps.
When the countdown reaches zero, the alarm will ring. You can Stop the alarm or press Snooze to delay it by 10 minutes.
Will the Alarm Work If the Tab Is Closed?
No, the alarm requires the browser tab to stay open. However, the alarm will still work if you switch to another tab or use different apps, as long as the alarm tab remains open in the background.
Does the Alarm Work in Sleep Mode or When Shut Down?
- Sleep mode - The alarm will not ring if your computer is fully asleep. If only the display is off, it usually works (test on your device to confirm).
- Shutdown - The alarm will not work when the computer is turned off.
Is the Online Alarm Clock Loud Enough?
Yes, the alarm sound is designed to be loud enough to get your attention. The volume depends on your device settings. Make sure your speakers or headphones are turned up for the best results.
Setting Alarms on Your Computer
If you prefer using your device’s built-in tools:
- Windows 10/11: Use the Clock app to set alarms, timers, and stopwatches.
- MacBook/iMac: Use the Calendar app or install a third-party alarm clock app.
✅ Use our free online alarm clock anytime you need a quick and reliable alarm no installation required.