Online Alarm Clock
Set a simple alarm directly in your browser.
How to Use the Online Alarm Clock
This browser alarm clock lets you choose a specific clock time for a simple reminder. It is useful for meetings, study breaks, cooking checkpoints and other everyday tasks when you want an alert at a particular time.
Example
If you need to leave for an appointment at 14:30, set the alarm for 14:20 to give yourself ten minutes to prepare. Keep the page open so the browser can trigger the alert.
Factors That Affect Alarm Reliability
The page must remain open, and some phones or browsers may limit timers in inactive tabs or while the device is sleeping. System clock settings also affect when the alarm fires.
Frequently Asked Questions
Does the tab need to stay open?
Yes. The page needs to remain open for the browser timer to run.
Will the alarm work if my phone sleeps?
It may vary by browser and device because background tabs can be throttled or suspended.
Can I clear an alarm before it rings?
Yes. Use the Clear button to cancel the current alarm.
How the Tool Works and Its Limits
A browser alarm depends on the device, browser and tab remaining able to run or deliver audio. Sleep mode, muted audio, background restrictions and closed tabs can prevent an alert, so critical wake-up or appointment alarms should use the device’s native alarm system.