Alarm Clock Online

An online alarm clock that turns any browser into a reliable wake-up tool: tab sound when the page is open, push and Telegram for everything else.

Alarm

Set an alarm time and get pinged through your channels of choice.

Channels
Browser (off)
08:00
08:00
An online alarm clock is only useful if it actually wakes you up. The hidden traps with browser-only alarms are well-known: the tab gets backgrounded and audio is muted, the laptop sleeps, the OS revokes notification permission after months of inactivity. This page sidesteps all three. When you press Set, the alarm is registered server-side and dispatched at the chosen time over the channels you ticked. The in-tab sound is a 4-tone chime generated with the Web Audio API — no asset to load, no autoplay surprises. If the browser blocks audio, push and Telegram still go out. Many users keep this page open on a second monitor as a fixed-time reminder during the workday: 9 a.m. stand-up, 12:30 lunch, 4:55 wrap-up. Others bookmark a specific time like /alarm/7-am and let it pre-fill. The widget remembers nothing across sessions by design — privacy-friendly, no account needed for guest use.

FAQ

Can I leave the alarm clock running in the background?
Yes. The visible countdown updates while the tab is open. The actual delivery does not depend on the tab — it's scheduled on the server at the moment you press Set.
Does the alarm work on a Chromebook?
Yes. Browser push works on Chrome OS. Telegram delivery works in the Telegram web or PWA.
What sound does it play?
Four short 880 Hz beeps — distinct enough to register, short enough not to annoy a quiet office. For louder alarms, rely on push or Telegram on your phone.
Can I see a 12-hour clock instead of 24-hour?
The input is 24-hour for clarity (no a.m./p.m. ambiguity). The notification text and the URL paths use a.m./p.m. for English locales — e.g. /alarm/7-am for 07:00.

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