20 Minutes Timer
A free online 20 minutes timer — preset and ready. Press start and it counts down with a sound alert at zero.
tap to edit
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How to use it
- 1
It's preset
The timer is already set to the duration.
- 2
Press start
The countdown begins immediately.
- 3
Get alerted
A sound plays when the timer reaches zero.
Frequently asked questions
How do I start the 20 minutes timer?
This page is already set to 20 minutes. Just press Start and it counts down to zero, then plays a sound alert. Keep the tab open while it runs.
Does it work in the background?
Yes, on a computer: the timer keeps accurate time in a background tab and rings when it finishes. Closing the browser stops it. On a phone, the browser may pause a background tab or a locked screen: the time is still right when you come back, but the sound can't play while it's paused, so keep the screen on.
Can I change the duration?
Yes — use “Set Duration” on the timer to pick any custom time, or open the main Countdown Timer.