Countdown Timer

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Time's up! The alert sound couldn't be played automatically.

Start a timer from the URL

/timer/5m: 5 minutes
/timer/90s: 90 seconds
/timer/1h30m: 1 hour 30 minutes
/timer/25m30s: 25 minutes 30 seconds
/timer/1:30:00: hh:mm:ss (or 5:00 for mm:ss)
/timer/000500: raw HHMMSS digits

Long forms work too (5min, 90sec, 1hour). ?t=5m and ?timer=000500 are equivalent. Maximum is 99:59:59.

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Click anywhere to enable the alarm

Browsers mute pages until you interact with them. Your countdown is already running behind this.