Pomodoro Timer

The Pomodoro technique splits work into fixed focus sessions separated by short breaks. This timer runs the cycle for you: a focus session, a short break, and a longer break after a set number of rounds.

The default lengths are 25 minutes of focus, 5 minutes of short break and 15 minutes of long break after four sessions. Every length can be changed, and your settings are remembered in this browser.

How pomodoro timer works

Press Start to begin a focus session. When it ends the timer plays a short tone and moves to a break on its own, then back to focus. After the number of focus sessions you have chosen, the break is the long one.

You can skip to the next session, jump to any session type, or reset the whole cycle. The remaining time is also shown in the browser tab title, so you can see it while working in another tab.

The timer works from the exact time the session should end rather than counting ticks, so it stays accurate even if the tab is slowed down in the background. Keep the tab open for the alert to play.

The formula

One cycle  =  4 × focus + 3 × short break + 1 × long break
Default cycle  =  4 × 25 + 3 × 5 + 15  =  130 minutes

Of those 130 minutes, 100 are focused work.

Worked example: a morning of four sessions

Starting at 9:00 with the defaults: focus until 9:25, break until 9:30, focus until 9:55, break until 10:00, focus until 10:25, break until 10:30, and a fourth focus session until 10:55.

The long break then runs from 10:55 to 11:10. Total time from start to the end of the long break is 130 minutes, which includes 100 minutes of focus.