Alarm settings
Choose a clock time. If that time has already passed today, the next occurrence is tomorrow.
Online Alarm Clock
Set a browser alarm for a time of day, see the next occurrence clearly, test the sound, and keep the alarm clock fullscreen when useful.
How this online alarm clock works
Choose a clock time, then set the alarm. If the selected time has already passed today, the alarm is scheduled for tomorrow at that same local time so the next occurrence is always in the future.
The alarm runs in your browser and uses your device clock. Keep the page open, keep the device awake, and check volume, mute, and audio permission settings before relying on the sound.
Alarm clock vs alarm timer
An online alarm clock is for a time of day, such as 3:30 PM. The alarm timer is for a countdown duration, such as 15 minutes from now.
For quick duration-based reminders, use the countdown timer or online timer. For a simple clock display, use the digital clock.
Common uses and limitations
Use this web alarm clock for reminders, study breaks, cooking checks, meeting start reminders, and desk alarms. Browser alarms can be affected by sleeping devices, closed tabs, audio permissions, volume settings, and muted speakers.
For break reminders, try the break timer. This page does not use notifications or claim guaranteed alarm delivery.
Online alarm clock FAQ
What happens if the alarm time already passed today?
The alarm is scheduled for the next occurrence, which means tomorrow at that same clock time.
Does the browser need to stay open?
Yes. Keep this page open, keep the device awake, and make sure volume or mute settings allow the alarm sound.
How is this different from an alarm timer?
This page schedules an alarm for a time of day. The alarm timer counts down for a chosen duration.