Step by step
- Select your target alarm time, or click a quick preset for 5, 10, 30 minutes, or 1 hour.
- Type an optional label such as a meeting name or reminder.
- Choose Classic alarm, Beep, or Soft chime, and click Test sound to verify your speakers.
- Click Set alarm and keep the tab open until it rings.
At a glance
| Feature | Browser alarm | Installed app |
|---|---|---|
| Installation required | None | Requires download and permissions |
| Sign-up or account | None | Often required |
| Works on locked PCs | Yes, in any browser | Blocked by admin rules |
| Runs when tab closes | No | Yes |
Related questions
Can I use an alarm clock without installing an app on a school or work PC?
Yes. Because it runs entirely in your web browser, you do not need administrator permissions or software downloads.
Is this online alarm clock free to use?
Yes, it is completely free with no sign-up required.
What if I need an alarm that works even when my browser is closed?
A browser alarm cannot ring if the tab is closed or the computer sleeps. For overnight wake-up calls, use your phone's built-in clock app.
More questions: online alarm clock
- How to Set an Alarm Clock on a Laptop or PC
- Does an Online Alarm Clock Ring If the Computer Sleeps?
- Can You Use an Online Alarm Clock on iPhone or Android?
- Does an Online Alarm Clock Work Without Internet?
- How to Set an Online Alarm Clock Countdown for Studying
- How to Use a Loud Online Alarm Clock for Heavy Sleepers
- How Does Snooze Work on an Online Alarm Clock?
- Can You Set Multiple Alarms or Custom Music Online?
Open the full online alarm clock →
Updated November 14, 2026.