Set Alarm for 12:00 AM
A free online alarm clock preset to 12:00 AM. Press Start, leave this tab open, and it will ring at 12:00 AM sharp.
Keep this tab open. For alarms that work with your phone locked, get AVA.
Waking up at 12:00 AM
A midnight alarm is rarely about mornings. It marks the start of a graveyard shift, the moment a deadline crosses into a new day, a medication that has to be taken exactly twelve hours after the last dose — or a hard stop that finally kicks you off the game and into bed.
Very few 12:00 AM alarms are about starting a normal day. This is a wake-up for people who work, travel or care for someone while the rest of the city sleeps — and the alarm that does it has to punch through the deepest sleep of the night.
Alarms in the small hours fail for one reason above all: the sleeper is in deep, slow-wave sleep and simply does not hear them. Use maximum volume, put the alarm across the room if you can, and add a backup a few minutes after 12:00 AM — redundancy beats willpower at this hour.
If 12:00 AM is a regular wake-up rather than a one-off, build your sleep around it deliberately: a consistent main block at the same hours every day, a dark and cool room, and no screens in the last half hour before bed. A strange schedule kept consistently beats a normal schedule kept badly.
FAQ
- How do I set an alarm for 12:00 AM?
- Press Start above — the page counts down to the next 12:00 AM and plays a loud beep through your browser using the WebAudio API. Keep this tab open and your volume up. No download or signup needed.
- Why is it so hard to wake up at 12:00 AM?
- 12:00 AM falls in the body's deepest sleep window, when slow-wave sleep dominates and reaction to sound is weakest. Use full volume, place the device away from the bed, and set a second alarm a few minutes later as a backup.
- Will the alarm ring if my screen is off or the tab is closed?
- No — a browser alarm needs this tab open and the device awake. If the phone locks or the tab closes, the beep cannot play. For alarms that ring reliably even over the lock screen, use the AVA app.
Nearby alarm times
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