12 Minute Timer
Free online 12 minute countdown timer with alarm
Set a 12 minute timer for hard-boiled eggs, a quick HIIT round, a reading sprint, or a short nap. The 12 min countdown keeps running in a background tab with a sound alarm.
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Set a free 12 minute timer online. Get an alarm when your 12-min countdown finishes. Works in the background on desktop and mobile.
TimerHub calculates remaining time from an absolute finish timestamp, so missed browser callbacks do not create drift. Read the timing accuracy methodology and reproducible tests.
Common Uses
- Hard boiled eggs
- Quick HIIT round
- Reading sprint
- Short recharge nap
- Speed-cleaning one room
How to Use the 12 Minute Timer
- Press Start — or the Space bar — to run the 12 minute countdown. Space also pauses and resumes it; R resets it
- Adjust by 1 minute with the +/- buttons while it runs, toggle Repeat to loop it, and check the finish time shown under the display
- Use the Fullscreen control below the timer for a room-sized countdown (Esc to exit)
- Choose or mute the alarm in the header's sound settings, and pick a background sound — rain, ocean, fireplace or brown noise — that fades out at zero
- Enable notifications to be alerted when your 12 minute timer finishes in a background tab, and add
?autostart=1to the link to start the countdown on load
Frequently Asked Questions
How long is 12 minutes?
12 minutes is exactly 720 seconds. Our free 12-minute timer counts down precisely and alerts you when time is up.
What can I do in 12 minutes?
A 12 minute timer is great for hard boiled eggs, quick hiit round, reading sprint. Set it and focus on your task — the alarm will let you know when time is up.
Does the timer work in the background?
Yes, our timer continues running even if you switch to another tab or minimize your browser. Enable notifications to get alerted when it finishes.
Does the alarm sound when the timer finishes?
Yes, an alarm plays automatically the moment the 12 minute countdown reaches zero, with an optional vibration on mobile. Enable notifications for an extra system alert, even from a background tab.
Can I make the timer fullscreen?
Yes, use the Fullscreen control below the timer to expand the countdown to your whole screen — great for classrooms, presentations, and workouts. Press Esc to exit fullscreen.
Can I use the 12 minute timer on my phone?
Yes, our 12 minute timer is fully responsive and works on all devices including iPhone and Android. Open this page in your mobile browser and tap Start.