ClockHub
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Alarm Clock

Set a free browser alarm clock with quick alarm times, a test sound button, and a shareable alarm link.

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Browser alarm reliability

Test the sound before relying on the alarm. This alarm works while the page stays open and your device stays awake. Muted tabs, sleeping devices, closed tabs, and browser autoplay rules can prevent sound.

Tool guide

Alarm Clock

Online browser alarm clock

Set a free browser alarm clock with quick alarm times, a test sound button, and a shareable alarm link.

Free online alarm clock

Set one browser alarm for a local time, test the sound, and keep the alarm visible on desktop, tablet, or mobile screens.

  • Use quick morning times or short offsets for reminders
  • Copy a clean link that keeps the alarm time and label
  • Keep the page open and test sound before relying on it

Related tools

TimerCountdown TimerDigital Clock

Prepare the alarm before you walk away

Use this online alarm clock as a visible browser reminder while the tab stays open. Confirm audio and power settings before using it for a deadline.

  • Press Test sound once after changing browser, device, or headphone audio settings
  • Keep the ClockHub tab open and prevent the device from sleeping
  • Use a native alarm app for wake-up alarms, medication, travel, or anything safety-critical

Honest browser limits

ClockHub does not promise closed-tab, sleeping-device, or background notification alarms. Use a native alarm app for safety-critical wake-up alarms.