Set multiple alarms with custom labels, repeat options, and notification sounds using Web Audio API.
Online Alarm Clock schedules several time-of-day alerts on one browser page. For each alarm, choose a time, add a label, select repeat days, and choose a notification sound. The page uses Web Audio to produce the alert locally, without uploading the alarm details. The important surprise is that this is not an operating-system alarm: closing the page, suspending the device, or muting browser audio can prevent the sound. It is best suited to periods when the browser and device will remain active.
A concrete input and expected output from the current implementation.
Input
Time: 2:05 PM Label: Stretch Repeat: Monday, Wednesday, Friday
Expected output
A repeating alarm labeled "Stretch" is scheduled for 2:05 PM on Monday, Wednesday, and Friday. It is not scheduled for the other four days.
The selected weekdays define three weekly occurrences. The label identifies this alarm when its scheduled time arrives; it does not change the timing.
Each alarm has its own clock time, descriptive label, repeat selection, and notification sound. The time specifies when it becomes due, while the selected days determine which weekly occurrences apply. Because alarms are separate entries, you can keep several schedules on the same page, such as a morning reminder and a later end-of-day alert.
When an alarm becomes due, the open page plays its selected notification sound through browser audio. The audible result therefore depends on the browser remaining available, the device staying awake, and the active audio output being usable. Alarm information and sound handling remain in the browser rather than being sent to a remote alarm service.
No, not reliably. This alarm belongs to the web page, not the device's system alarm service. Keep the tab open, keep the device awake, and confirm that browser audio is not muted. If the computer sleeps or the browser is closed, the scheduled sound can be missed or delayed.
Yes. The tool is specifically designed for multiple alarms. Give each entry its own time, label, repeat-day selection, and notification sound. This lets one page represent unrelated schedules without combining their labels or recurrence patterns. The alarms still share the same browser and device availability limitations.
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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