How to set an alarm
- Type the alarm time (or use the arrows in the box). The alarm is set the moment you change it; Set alarm confirms it on the screen.
- Pick a sound: classic beeps, a sharp digital beep or a gentle chime that starts softly and gets louder. Press Test sound to hear it — this also lets your browser play the alarm later.
- Add a label if you like (“Call mom”, “Take the bread out”); it is shown when the alarm rings.
- Leave the tab open. The big clock shows the current time, the countdown shows how long until the alarm, and the browser tab’s title shows the alarm time.
- When it rings, press Stop, or Snooze 5 min to hear it again in five minutes. Turn alarm off cancels it before it rings.
The alarm runs entirely in your browser: no account, no app, nothing sent to a server. The page remembers your last settings on this device, so your usual alarm is ready the next time you open it.
Quick alarms
Each link opens the alarm clock already set to that time — bookmark the ones you use.
| Alarm | Often used for |
|---|---|
| Set alarm for 5:00 AM | Early shift, a workout before work |
| Set alarm for 5:30 AM | Early commute, morning prayer or meditation |
| Set alarm for 6:00 AM | A common wake-up time for school and work days |
| Set alarm for 6:30 AM | Getting children ready for school |
| Set alarm for 7:00 AM | Standard office-day wake-up |
| Set alarm for 7:30 AM | A later start or a remote work day |
| Set alarm for 8:00 AM | Weekend wake-up, start of the workday |
| Set alarm for 9:00 AM | A meeting or class reminder |
| Set alarm for 12:00 PM | Lunch break reminder |
| Set alarm for 3:00 PM | School pickup, an afternoon call |
| Set alarm for 5:00 PM | End of the workday |
| Set alarm for 10:00 PM | Bedtime reminder |
If the time you choose has already passed today, the alarm is set for the same time tomorrow — the Rings card says which day.
How the online alarm works
The page takes the time you enter and finds its next occurrence in your device’s local time zone: today if it is still ahead, otherwise tomorrow. The countdown is recalculated from the clock every second, so it never drifts.
Browsers slow down pages you are not looking at. Chrome, for example, documents that in a tab hidden for more than five minutes, chained timers are checked only once per minute. An alarm that waited for such a timer could ring almost a minute late, so this one schedules its sound in advance on the browser’s audio clock, which keeps running at full precision in background tabs. The sounds are generated by the browser itself (the Web Audio synthesizer), so no audio file has to load.
Keep the screen on asks the browser to stop the screen from dimming and locking while the alarm page is visible, where the browser supports it. It matters most on phones and laptops on battery, which otherwise go to sleep and take the alarm with them.
Make sure your alarm rings
- Keep the tab open. Closing the tab or the browser cancels the alarm. It can be in the background or behind other windows.
- Don’t let the computer sleep. A sleeping or hibernating computer runs no web pages. Plug a laptop in and keep the lid open, or change the sleep setting for the evening.
- Turn the volume up and check that the tab is not muted (right-click the tab in desktop browsers).
- Press Test sound once. Browsers block sound on pages you have not interacted with; one click or key press anywhere on the page unlocks it.
- For waking up, use your phone’s built-in alarm as the main alarm. It rings even when the phone is locked or silent, which no web page can do.
Which sound to choose
| Sound | What it sounds like | Good for |
|---|---|---|
| Beeps | Three firm beeps, repeated | The classic bedside alarm; hard to miss |
| Digital | Four short, high beeps, like a digital watch | Noisy rooms, or when other sounds are playing |
| Gentle chime | A soft three-note chime that grows louder over the first half-minute | Naps and quiet reminders |
Tips
- Timing a nap? A countdown is simpler: the online timer rings after 20 or 90 minutes. To time something as it happens, use the stopwatch.
- Wake up between sleep cycles. The sleep calculator suggests wake-up times that land at the end of a roughly 90-minute cycle, so you feel less groggy.
- Meeting in another city? Convert the time first with the time zone converter, then set the alarm in your own local time.
- Several alarms: open this page in two tabs; each tab keeps its own alarm.
Frequently asked questions
Will the alarm ring if my computer goes to sleep or I close the laptop lid?
No. A sleeping computer runs no web pages, so the alarm cannot ring until the computer wakes up again. Keep the computer awake (plugged in, lid open) and leave the tab open, or use your phone’s built-in alarm.
Why didn’t I hear anything?
Browsers only allow sound after you interact with a page. Press Test sound (or click anywhere on the page) once after opening it, check the volume, and make sure the tab and the device are not muted.
Can I use this alarm clock on my phone?
Yes, as long as the page stays open and the screen stays on — keep the “Keep the screen on” switch enabled and the phone plugged in. A locked phone pauses web pages, so for waking up the phone’s own clock app is the safer choice.
Does the alarm repeat every day?
It rings once. After you press Stop it turns off; press Turn alarm on to set the same time again for its next occurrence. The page also remembers your last alarm time on this device, so it is set again the next time you open the page.
Last updated: October 15, 2026