Online alarm clock

Set an alarm for a date and time in a chosen time zone, with a sound preview.

On your device · No account

Privacy details

Online alarm clock processes your input in this browser. Inputs and results are excluded from analytics. Recent tools save tool names, visit counts and last-visit times. Saved tools store only their names. Draft saving is optional and stays on this device; delete saved text with the draft controls. Loading text from a URL is optional and contacts that server; its URL and your IP address are visible to the server. An optional “Use in” action keeps a handoff in this tab. The next tool removes it on arrival and ignores it if more than a minute has passed.

Copy link includes the inputs you choose to share in the address. Anyone with that link can reopen them. Files and generated results are excluded. Password and key tools share settings only.

Alarm date and time

Time zone

Ready

Keep this tab open and your device awake. Browser suspension can delay sound; this is not a reliable wake-up alarm.

Timer settings and sound

Repeated clock hour

Play a sound at completion or phase change

Reset reloads the tool with its starting values and releases open files and device controls. Saved drafts stay on this device until you delete them.

Links include your inputs and settings. Anyone with the link can see them, so leave out private text. Files and generated results are left out; random draws run again.

Keyboard shortcuts

Updated 2026-09-20

Using Online alarm clock

Choose a future date and time, then Start. Preview sound lets you check browser audio before relying on the reminder. Completion shows Finished and plays one short tone when sound is enabled. Restarting preserves the selected clock deadline.

A worked example

An alarm at 14:00 UTC reaches its deadline when the UTC clock reaches 14:00. Changing your display time zone does not change the meaning of that selected UTC time.

Before you use the result

This cannot wake a sleeping device and is not a dependable wake-up alarm. Keep the tab open and the device awake. Browser suspension, muted audio or device-clock changes can delay or prevent the reminder. No notifications or permissions are requested.

Next: Countdown timer

Next: World clock

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ToolOctopus. “Online alarm clock.” Updated 2026-09-20. https://tooloctopus.com/online-alarm-clock.

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