Online Alarm Clock

What you can do

Set as many alarms as you like — pick a time, add a label, and choose a one-time alarm or a repeat (daily, weekly, or monthly). Edit changes any alarm and Stop alarm silences one that's ringing.

Full screen turns this into a bedside clock — a big, easy-to-read display you can leave on the nightstand. On supported devices, the page asks the screen to stay awake while it's open and plugged in — glance over and read the time like a real bedside clock. Your browser or device can still dim the screen, suspend the page or mute audio, so keep the device powered and test an alarm first. The buttons fade away for a clean face and come back the moment you touch the screen or move the phone. On a computer, Pop out opens a small floating clock that stays above your other windows (Chrome and Edge).

Alarms ring only while this page (or its floating window) is open — here's exactly how that works, and see browser timing limitations for why background tabs and mobile devices can affect that.

Using it in a classroom? The classroom timer & stopwatch guide covers full screen on a projector, keyboard shortcuts and what to test before a lesson depends on it.

Alarm clock FAQ

Does the alarm ring if I close the tab? No. It's a browser alarm, so it only rings while the alarm page or its full-screen or floating window is open. Keep it open for the alarm to sound.

Can I set repeating alarms? Yes — choose a one-time alarm, or repeat daily, weekly on chosen days, or monthly by date or weekday.

Can I use it as a bedside clock that stays on? Tap Full screen for a big bedside clock. On supported browsers and devices it will try to keep the display awake while open, but power-saving settings, browser restrictions, or device permissions may still dim or turn off the screen — keep your phone plugged in for the best results.