00:30
This free online 30 second timer is perfect for quick bursts like exercise intervals, breathing exercises, micro-breaks, posture checks, and more. You can start the timer with one click, and it will count down from 30 seconds — with an alarm when time's up.
Whether you're using it for productivity, classroom exercises, or personal routines, this countdown timer works on any device and requires no download.
You can choose to enable an alarm that sounds when the timer reaches zero. You can also change the sound of the alarm in settings.
A 30-second countdown is often used for quick activities like deep breathing, stretch breaks, water breaks, posture resets, or quick exercises.
