Online Alarm Clock

Free online alarm clock with support for multiple alarms, repeat settings, and snooze.

Alarm data is only saved in the current browser and will be lost when browser data is cleared or when switching browsers/devices.

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No alarms set yet. Click the button above to add one.

Pre-designed Timer

Pre-designed timers suitable for Pomodoro, meditation, study, work, and other scenarios. No download needed, ready to use upon opening, with all settings saved locally.

Features

Multiple Alarms

Set multiple alarms simultaneously, each can be independently enabled or disabled to meet different reminder needs.

Flexible Repeat

Support for one-time, daily, weekdays, weekends, or custom day-of-week repeat settings for various schedules.

Audio Alerts

Play continuous sound and browser notifications when the alarm rings, so you won't miss it even on another tab.

Snooze Function

5-minute snooze option available. The alarm will ring again after the snooze period ends.

Use Cases

Wake Up Reminder

Set wake-up alarms on your computer with repeat function for daily automatic reminders.

Meeting Reminder

Set advance reminders for upcoming meetings to ensure you're on time for every important meeting.

Medication Reminder

Set timed medication reminders with repeat function to ensure timely medication intake.

Cooking Reminder

Set alarm reminders while cooking to avoid overcooking and precisely control cooking time.

Using an online alarm clock in your browser

Set the alarm for the time shown by your device, then check the repeat days and volume. Before relying on a longer alarm, create one a minute ahead to check that sound works in this browser. Notification permission and audible sound are separate settings.

Keep this page open and the device awake. Closing the tab, muting the browser or allowing the computer to sleep can prevent an alarm from sounding; this page cannot wake a powered-off device. For a reminder after a set duration, use the timer instead of choosing a clock time.

For a quick check, set a one-time alarm for the next minute, test the sound, and keep the tab open until it rings. Dismiss stops the current alert; snooze creates a new alarm for the displayed delay. An alarm uses your device’s local clock, so review it if you change the device time or time zone.

FAQ

Will the alarm ring after closing the browser?

The online alarm requires the browser tab to remain open. The alarm won't ring if the tab or browser is closed. Keep the tab running in the background.

How do I set a repeating alarm?

How does the snooze function work?

Why am I not receiving browser notifications?

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