Alarm Clock

What is Alarm Clock?

The Online Alarm Clock is a free web-based utility that lets you set alarms directly in your web browser. Choose from multiple alarm sound clips and set wake-up reminders without installing apps.

How Does Alarm Clock Work?

It monitors the system clock in real time using local JavaScript intervals. When the current time matches your set alarm time, it triggers the browser's HTML5 Audio API to play your selected sound file locally.

How to Use Alarm Clock — Step by Step

1. Set the target alarm hour, minute, and AM/PM options.
2. Choose your preferred alarm sound clip from the list.
3. Click 'Set Alarm' to activate the timer.
4. Keep the browser tab open; the alarm will ring locally at the set time.

Key Benefits

• Audio Customization: Select different ringtones to suit your preferences.
• No Signup: Set alarms immediately without user accounts.
• Privacy-First: Reminders and alarms run entirely inside your browser sandbox.

Who Uses Alarm Clock?

• Wake-Up Reminders: Use your laptop or phone as a bedside alarm clock.
• Task Timing: Set reminders to take breaks or join meetings during work hours.

Tips & Best Practices

• Ensure your device volume is turned up and the browser tab is not muted before setting the alarm.
• Avoid closing the browser tab or putting your computer to sleep, as this stops background JavaScript timers.

Common Mistakes to Avoid

• Setting alarms in tabs that get auto-discarded by browser memory managers.
• Assuming the alarm will ring when the device is completely powered down.