Sometimes you do not want to count down minutes, you want something to go off at a specific time: wake me at 2:15, ring me at the top of the hour, get me up from this nap at half past. An alarm clock fixes on a time of day rather than a duration. Set the hour and minute in the online alarm clock, pick a tone, and it rings when the wall clock reaches it.
It is free, runs in your browser with no sign-up, and a live clock shows the current time while you wait.
Choose the time and a tone
Set the hour and minute you want the alarm to sound, and pick a tone to wake to. A gentle tone suits a nap; something more insistent suits a hard deadline you must not sleep through. The choice is yours, and it is the same two-tap setup whether the alarm is five minutes or five hours away.
Arm it and let the clock run
Arm the alarm and the live clock counts toward your time. Keep the tab open so it can ring. There is a small but important reason you tap to arm it: browsers only let a page play sound after you have interacted with it, so that single action unlocks audio for when the moment arrives. Without it, the alarm would reach your time and stay silent.
Stop or snooze
When it rings, stop the alarm to silence it, or snooze for nine more minutes if you need a moment longer. Nine minutes is the traditional snooze interval, short enough to keep you honest and long enough to feel like a reprieve. You can stop it for good at any point.
What it is good for
- Naps and rests. Drop off knowing something will wake you at a set time, not after an unknown drift.
- Time-of-day reminders. A nudge at 3pm to make a call or take medication.
- A desk backup. A second alarm beside your phone for an important moment.
- Things that finish at a known time. Cooking or laundry that you know ends at a particular clock time.
When a phone alarm is the better tool
This alarm is built for when you are near an open tab. It is genuinely useful for naps, desk reminders and backups. It is not the tool for waking out of deep sleep overnight, because that depends on the device staying awake and the page staying open, which laptops and browsers do not guarantee while you sleep. For the morning alarm that absolutely has to fire, trust a dedicated phone alarm and keep this one for daytime.
Common mistakes to avoid
- Closing the tab after arming it. The page has to stay open to ring. Minimise the window, do not close it.
- Skipping the arm tap. Without that interaction the audio stays locked and the alarm will not make a sound.
- Relying on it overnight. For deep-sleep wake-ups, use a phone alarm; reserve this for times you are awake and nearby.
If you want a duration rather than a clock time, the online timer counts down minutes with an alarm of its own, and the world clock helps when you are setting reminders against other people’s time zones.