Set multiple alarms with custom labels, snooze intervals, and alarm sounds in your browser.
This tool lets you create one or more alarms directly in your browser tab, each with its own time, text label, sound, and snooze length, with no app install. While the tab stays open, the page compares your device's current time against your alarm list and plays the chosen sound plus an on-screen label when a match hits. What most people don't expect: closing the tab, sleeping the computer, or letting the browser suspend the tab in the background can silence the alarm, so it isn't a drop-in replacement for a phone alarm on a device you plan to close.
A concrete input and expected output from the current implementation.
Input
Alarm 1: 06:45, label 'Gym', snooze 10 min. Alarm 2: 07:30, label 'Work', snooze 5 min.
Expected output
At 06:45 the 'Gym' alarm sounds and shows 'Gym'; if snoozed it re-rings at 06:55. At 07:30 the 'Work' alarm sounds and shows 'Work'; if snoozed it re-rings at 07:35.
Each alarm fires independently at its own set time, and snoozing adds that alarm's configured snooze interval to the moment you press snooze, not to the original alarm time.
Alarm times, labels, and sound choices are kept in the browser tab you're using, so they survive a page refresh. While the page is open, it repeatedly checks the device clock against every active alarm; when one matches, it plays the selected sound and displays the label on screen until you dismiss or snooze it.
Pressing snooze stops the current ring and reschedules that specific alarm for now plus the snooze interval you configured for it (e.g. 5 or 10 minutes) - it doesn't pause a countdown. Other alarms and the original daily time for a repeating alarm are unaffected by a snooze on one instance.
No. The alarm only runs while the page is open and the computer is active; sleep, hibernation, or closing the browser stops the timer entirely, so it can't wake a sleeping machine.
Yes, snooze interval is set per alarm, so for example a 10-minute morning alarm and a 5-minute nap alarm can run side by side without one affecting the other's snooze behavior.
The example and behavioral notes were checked against the browser implementation. Standards and primary references below define the relevant format, formula, or platform behavior.
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