Pick an alarm time, click Set alarm, and watch for the on-screen alert - Clear alarm cancels it.
Online Alarm Clock
This alarm clock runs entirely in your browser: pick a time, click Set alarm, and a bold on-screen message appears the moment the clock reaches it. There is nothing to download, install, or sign up for.
The page also shows the current time continuously in HH:MM:SS format with today's date, so you can check the time and set the alarm from the same screen. Set alarm reads the time field and shows a confirmation line; Clear alarm cancels the alarm and resets the status back to "No alarm set."
The alarm is driven by your browser's own clock, not a server or a background service, so there is no upload and no account. It does not play a sound or send a system notification when it fires - watch the tab for the on-screen "Alarm!" message. The tab also has to stay open: closing it or navigating away stops the check, since there is no background process keeping it running.
Use it for things like a short reminder while you are already at the computer, a wake-up check during a nap, or a cue to switch tasks at a set time - anywhere a visual, on-screen alert is enough and you do not need a phone-style push notification.
Prefer a countdown instead of a fixed time, or just want to watch the clock without setting anything? The companion countdown timer counts down from a duration you choose, and the digital clock and analog clock both show the current time as a live display. Nothing you do on this page is uploaded or stored; there is no account and no tracking.
Frequently Asked Questions
What does Online Alarm Clock do?
Lets you set an alarm time and shows a bold on-screen "Alarm!" message the moment the browser's clock reaches it, alongside a continuously updating current-time display.
Does it play a sound or send a notification when the alarm fires?
No - it shows an on-screen message only. There is no sound and no system notification, so keep the tab visible near the time you set.
Does the alarm still fire if I close the tab?
No. The alarm check runs only while the tab stays open - there is no background process, so closing the tab or navigating away stops it.
What complementary tools work well alongside online alarm clock?
The countdown timer counts down from a duration instead of a fixed time, and the digital clock and analog clock both show the current time as a live display if that is all you need.