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Pomodoro timer

Configure your work and break lengths and focus one interval at a time.

How Pomodoro timer works

Pomodoro Timer alternates work intervals and short breaks according to the Pomodoro technique: 25 minutes of focused work followed by a 5-minute break, with a longer 15-minute break after four completed work intervals. A soft audio cue plays at the end of each interval to signal the transition. All timing runs in your browser using a JavaScript interval; nothing you do on this page is sent to any server.

The Pomodoro technique was developed by Francesco Cirillo in the late 1980s as a time-management method. The 25/5/15 intervals are the classic defaults but the tool lets you customise all three durations to fit your own work rhythm. Each completed work interval is counted; the day's tally and your custom durations are saved in your browser's local storage, so a reload picks up where you left off.

Written by Bastien Sulyan

How to use Pomodoro timer, step by step

  1. Adjust the work, short break and long break durations if the defaults do not suit you.
  2. Click start to begin the first 25-minute work interval.
  3. Focus on your task until the audio cue signals the end of the work period.
  4. When the short break starts, step away from the screen, then click start again for the next work interval.
  5. After four work intervals, take the longer break before beginning the next cycle.

Common use cases

  • A writer uses Pomodoro intervals to draft articles in focused bursts, using the break to step away from the screen and reduce eye strain.
  • A software developer tackles a complex debugging session in 25-minute blocks, preventing the mental fatigue that comes from unbroken multi-hour stints.
  • A student revising for exams structures their day into Pomodoro cycles to maintain concentration across multiple subjects.
  • A remote worker uses the break cues as a reminder to stand up, move around and avoid long periods of sitting.

Frequently asked questions

Can I change the length of the work and break intervals?

Yes. The work interval, short break and long break durations are all adjustable. Enter your preferred minutes in the configuration fields before starting. Changes take effect from the next interval; adjusting mid-interval does not truncate the current one.

How does the audio cue work?

The cue is synthesised by the Web Audio API inside the browser; no audio file is fetched from an external server. The tone plays through your device's current audio output. If your browser or device is muted, the cue will not be audible but the visual interval change still occurs.

Does the timer track my completed Pomodoros across sessions?

The number of focus cycles completed today, along with your interval settings, is saved in your browser's local storage, so a reload resumes where you left off. Everything stays on your device: nothing is sent anywhere and no cookie is set. Clearing this site's data in your browser settings resets the count.

What happens to the timer if I switch to another tab during a work interval?

The interval continues counting down in the background. Browsers may throttle JavaScript timers slightly in background tabs, but for 25-minute intervals this effect is negligible. The audio cue will play when the interval ends, whether or not the tab is in focus.

How many work intervals trigger the long break?

The classic Pomodoro rule is four completed work intervals before a long break. The tool follows this default. If you adjust the interval count threshold, the new value applies from the current cycle onward.