How to use the 30 Second Timer
- The timer is already set to 30 seconds. Press Start or the space bar.
- Press it again to pause, and Reset (or R) to go back to the start.
- When time is up, an alarm plays and the screen flashes. Click Stop alarm to silence it.
- Need a different time? Change the boxes or pick another preset below the clock.
What a 30 second timer is good for
- Planks and wall sits: a good starting hold for beginners.
- HIIT intervals: 30 seconds of work, then rest.
- Speaking practice: an elevator pitch or a quick answer to an interview question.
- Quick games: a round of charades or Pictionary.
Accurate in the background
The countdown is measured against your device's clock, not by counting ticks, so 30 seconds is exactly 30 seconds even when you switch to another tab. The time left also shows in the tab title. On phones, keep the screen on so the alarm can play.
Bookmark this page to have a 30 second timer one click away, or use the online timer to set any time you like.
Frequently asked questions
Can I repeat the 30 seconds?
Yes. When the alarm rings, click Stop alarm and press Start again to run another 30 seconds.
Does the 30 second timer make a sound?
Yes. A chime repeats for up to a minute when time is up, and phones that support it vibrate too. Use Test sound to check your volume first.
Is it free?
Yes, completely free, with no sign-up.