Online Alarm Clock

Thứ ba, 3 tháng 6 năm 2025
22:05:59

Set alarm time

Sound

- Sound will play when countdown ends
Alarm time:

Alarm name

List alarms

Time
Countdown
Time
Actions

Online alarm clock – Set alarms with sound, title & countdown

Never miss an important task again with our powerful and free Online Alarm Clock. Whether you're working, studying, meditating, or cooking, this alarm tool helps you stay on track with accurate timing and flexible features—all from your browser, with no need to install anything.

🔔 Key features

  • Custom Alarm Time: Set any hour and minute you need, or choose from our list of popular alarm times like 6:00 AM, 7:30 AM, or 8:00 PM for quick scheduling.
  • Alarm Name: Give your alarm a title so you know what it's for—like "Take medicine" or "Break reminder".
  • Selected Sound: Pick from a variety of pleasant alarm sounds and preview them before setting.
  • Countdown Timer: A live display shows how much time remains before the alarm rings—perfect for tracking short naps or productivity blocks.
  • Scheduled Time Display: Clearly shows the exact alarm time you've chosen.
  • Alarm On/Off Toggle: Easily enable or disable your alarms without deleting them.
  • Delete Alarm: Remove any alarm instantly with a single click.
  • Light/Dark Mode: Switch between day and night display modes to suit your screen and eyes.
  • Sleep Mode: Your screen dims automatically when inactive, conserving energy and making alarms less intrusive until they go off.

🌟 Why use an online alarm clock?

This web-based alarm clock is perfect for users who want quick, customizable alarm settings without installing apps. It’s available on desktop, tablet, or mobile, and works seamlessly in most browsers. The responsive design ensures clear visibility, and the alarm sound plays even if the browser is minimized (make sure your sound is on).

Unlike traditional clocks, this alarm clock is enhanced by modern browser technology and runs in real time. Whether you're managing your sleep cycles, tracking your morning routine, or timing online meetings, it's your reliable timekeeper.

⏲️ Explore other time tools

If you need to set a countdown, try our Online Timer tool—it lets you define durations and get notified when time runs out. Or check our Online Clock to view the current time in fullscreen digital, analog, or flip formats.

📱 Works on all devices

Whether you're using a PC, Mac, smartphone, or tablet, our Online Alarm Clock adapts to your screen. With no registration or downloads required, it's ready to use instantly. Just open the website, set your alarm, and let it run in the background.

📝 Export and manage alarm data

Alarms are automatically saved and displayed in a structured list. Need to keep a record? You can export alarm logs to Excel or CSV formats for better task management or reporting. You also have the option to delete previous data to keep things clean.

💡 Tips for best use

  • Always keep the tab open and your browser unmuted to ensure alarms play correctly.
  • Use descriptive names for alarms to quickly understand their purpose.
  • Use dark mode for late-night reminders or sleep tracking.
  • Enable sleep mode to save energy and reduce distractions when inactive.

Start using this free Online Alarm Clock now and take control of your time like never before!

🛠️ More time management tools

Online alarm help & questions

1. What is an online alarm clock?
➥ An online alarm clock is a web-based tool that lets you set alarms directly from your browser without needing to install any app or software.
2. How do I set an alarm online?
➥ To set an alarm, choose a specific hour and minute or select from common preset times. Then assign a name and pick a sound before activating the alarm.
3. Will the alarm still work if I close the tab?
➥ No, the alarm only works while the browser tab is open and active. For best results, keep the tab open and your device’s sound unmuted.
4. Can I give my alarm a custom name?
➥ Yes, each alarm can have a custom name to help you remember its purpose, such as 'Meeting at 2 PM' or 'Take medicine'.
5. Can I choose different alarm sounds?
➥ Yes, you can select from a variety of built-in alarm sounds and preview them before saving your alarm.
6. Does this online alarm clock work on mobile phones?
➥ Yes, it is fully responsive and works on smartphones, tablets, and desktops across all modern browsers.
7. Is the online alarm clock free to use?
➥ Yes, this alarm clock is 100% free to use with no registration or downloads required.
8. Can I set multiple alarms at once?
➥ Yes, you can create and manage multiple alarms with individual times, sounds, and names.
9. What happens when the alarm goes off?
➥ When the alarm time is reached, the selected sound will play and the screen will alert you with a visual notification if enabled.
10. How do I delete or turn off an alarm?
➥ Each alarm has a delete button and an on/off toggle. Use these to disable or remove alarms anytime.
11. Will the alarm still ring if my computer goes to sleep?
➥ No, the alarm will not work if your device enters sleep mode or is turned off. Please keep the screen active or use sleep mode built into the alarm tool.
12. What is sleep mode in this alarm clock?
➥ Sleep mode dims the screen when idle, helping you reduce distractions and save energy until the alarm rings.
13. Can I export or save my alarm data?
➥ Yes, alarms can be saved automatically and exported as CSV or Excel files for reference or scheduling purposes.
14. What browsers are supported?
➥ The alarm clock works in all modern browsers including Chrome, Firefox, Safari, and Edge.
15. Is there a dark mode for nighttime use?
➥ Yes, a dark mode is available to reduce eye strain during nighttime or low-light environments.