An alarm clock that lives in your browser
This online alarm clock rings at the exact time you choose, as long as this tab stays open. It is handy when your phone is charging in another room, when you need a reminder during a long work session, or when you want a loud signal at the end of a nap. You can run several alarms side by side, give each one a label, and pick a different sound for each.
Alarms are stored in your browser, so an accidental refresh does not wipe them out. If you need a duration instead of a clock time – "ring in 25 minutes" – the timer is the better fit.
How to set an alarm
- Check the big clock at the top. It shows your device time, which is the time the alarm uses.
- Choose the hour and minute, or tap one of the quick picks.
- Pick a sound and press Test to hear it at your current volume.
- Add a label if you like (for example "Leave for training") and press Set alarm.
- When it rings, press Stop to end it or Snooze to hear it again a few minutes later.
Tips for a reliable wake-up
- Keep the laptop plugged in and the lid open. A sleeping computer cannot play sound.
- Turn the system volume up and test the sound once before you go to bed.
- While an alarm is active the page asks the screen to stay awake on supported browsers.
- Open the settings (gear icon) to change the snooze length, the volume, or to let the alarm stop by itself after a minute.
Why people use an online alarm
Athletes use it for nap timing between double sessions, students for study blocks, remote workers for meeting reminders, and cooks for longer roasts. Because it runs on the computer you are already using, the signal reaches you even when your phone is on silent.
Frequently asked questions
Will the alarm ring if I switch to another tab?
Yes. The tab does not need to be visible, it only needs to stay open. You can keep working in other tabs or apps.
Does it work if my computer goes to sleep?
No. When the computer sleeps or the laptop lid is closed, the browser is paused and no sound can play. Keep the device awake and plugged in.
Can I set more than one alarm?
Yes. Every time you press Set alarm a new alarm is added to the list. Each one can have its own label and sound.
Do I need an internet connection?
Only to load the page. Once it is open, the alarm keeps working even if your connection drops.
Why did I not hear anything?
Browsers block sound until you interact with the page. Click anywhere on the page once after loading it, check that the tab is not muted, and test the sound.