Online Alarm Clock
Set browser alarms, reminders, and wake-up alerts with simple repeat controls and quick alarm presets.
No alarms in this view.
Quick add
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Plan time and stay on track
Use alarms for a specific alert time, timers for countdowns, and the online clock when you need local time in another city.
FAQ
Online alarm clock questions
How do I set an online alarm?
Use Add Alarm or a quick-add button, choose the alarm time and repeat pattern, then save it. Keep the page open for the most reliable alert.
Can I create repeat alarms?
Yes. Alarms can repeat on weekdays, weekends, every day, custom days, or just once.
Does the alarm play sound?
Yes. ClockHorizon can play an alarm sound in your browser after the page has permission to play audio.
Is this online alarm clock free?
Yes. The ClockHorizon alarm clock is free to use in your browser.