Online Alarm Clock

No. There is no app to download, no browser extension, and no sign-up. Open the page, set a time, and the alarm is active. Everything runs in JavaScript already loaded in your browser, so there is nothing to install and nothing tied to an email address or a password.

No, and no browser-based alarm clock can promise otherwise. A web page can only run code while its tab is open, so closing the tab or the browser stops the countdown entirely. Keep the tab open, even in the background, and the alarm will still fire at the right time.

Yes, with no limit built into the tool. Add as many as you need, each with its own time, optional label, and repeat setting. They are listed together sorted by whichever rings soonest, and every one keeps counting down and firing independently of the others.

Yes, as long as you use the same browser on the same device and do not clear its site data. Alarms are saved to local storage the moment you add them, so reloading the page or restarting the computer does not erase your list, even without an account.

No. Like every alarm that runs on a web page, it needs the browser open and the computer awake to check the time and play a sound. Many laptops also pause background tabs during sleep. For a wake-up you cannot miss, pair it with your phone's built-in alarm as a backup.

Check "Repeat every day" before adding it. A repeating alarm fires once at its set time, then automatically re-arms itself for the same time the next day, with no need to recreate it. Turn its switch off at any point to stop the repetition without deleting it.

A tone plays on a loop and a banner appears naming the alarm, and both continue until you press Dismiss. That is deliberate: a sound that plays once and stops is easy to sleep through. If several alarms fire together, each gets its own Dismiss button, plus one to clear all of them at once.

Yes, if you turn on desktop notifications with the button under the alarm list. Your browser will ask for permission once, and after that every alarm also fires a native system notification, so you notice it even if this tab is not the one currently in focus.

No, they solve different problems. A countdown timer runs for a duration you choose, like 10 minutes, and stops. This alarm clock fires at a specific clock time, like 7:30 AM, whenever that time arrives, today or on a future day. Use whichever matches what you are actually scheduling.

No. Alarms are stored only in your own browser local storage, on your device, and are never sent to a server. Nobody else, including us, can see what you have set. The only person who can see them is anyone using that same browser profile on that same computer.