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Pomodoro Timer — Focus & Break Cycles

Pomodoro focus timer with automatic work/break cycling, custom durations, chime and notifications. Settings saved locally.

Free No signup Client-side Privacy friendly Updated
completed focus sessions:

Settings (minutes)

A long break follows every 4 focus sessions. Settings are saved in your browser.

How to use

  1. 1 Press Start to begin a focus session (default 25 minutes).
  2. 2 When it ends, a short break starts automatically; every 4th break is a long one.
  3. 3 Adjust the focus / break lengths in Settings — they’re saved for next time.

Why use this tool

  • The Pomodoro Technique: focused sprints with regular breaks to sustain concentration.
  • Automatic work/break cycling with a long break every four sessions.
  • Settings persist locally; a chime and notification mark each switch.

Frequently asked questions

What is the Pomodoro Technique?

A time-management method that breaks work into focused 25-minute intervals (“pomodoros”) separated by short breaks, with a longer break after four intervals.

Can I change the durations?

Yes — set your own focus, short-break and long-break lengths in Settings. They are saved in your browser.

Will it notify me when a session ends?

It plays a short chime and, if you allow notifications, shows a desktop notification at each switch.

Does it keep running if I switch tabs?

Yes — the timer keeps counting in the background while the page is open.

What is Pomodoro Timer?

A Pomodoro timer structures work into focused intervals separated by short breaks, with a longer break after every four sessions, to sustain concentration.

Features

Automatic work/break cycling

Counts down a focus session, then automatically switches to a short break, with a long break inserted after every 4th focus session.

Custom durations

Set focus (1–180 min), short break (1–60 min) and long break (1–120 min) lengths; the 4-session cycle to a long break is fixed.

Chime + desktop notification

Plays a short sine-wave beep via the Web Audio API and, if permission is granted, shows a Notifications API alert at every session switch.

Local persistence, no upload

Your focus/break settings are saved to the browser's localStorage; the timer and countdown run entirely client-side.

Example

Input

Settings: focus = 25 min, short break = 5 min, long break = 15 min (defaults); press Start.

Output

Session 1: 25:00 countdown → chime + notification → 5:00 short break. Repeats; after session 4's focus block, a 15:00 long break plays instead of a short one. Completed-session counter increments after each focus block; settings persist in localStorage for the next visit.

Common use cases

  1. 1

    Focused work sprints

    Break a task into timed intervals with enforced breaks to sustain concentration and avoid burnout.

  2. 2

    Study sessions

    Structure revision or reading into fixed focus blocks with short breaks and a longer rest every four rounds.

  3. 3

    Remote-work time boxing

    Use the audible chime and desktop notification to stay on schedule across browser tabs without watching a clock.

Summary

Zerethon's Pomodoro timer cycles a 25-minute focus session with a 5-minute short break, inserting a 15-minute long break every 4th session, using a JavaScript setInterval countdown, the Web Audio API for an end-of-session chime, and the Notifications API for a desktop alert. All state runs and is stored (via localStorage) entirely in your browser — nothing is uploaded to a server.

Category
Productivity
Pricing
Free
Privacy
Browser-based
Signup
Not required

References

Privacy

Your data never leaves your browser unless explicitly stated. Pomodoro Timer runs entirely client-side — no server upload, no logging, no tracking of your input.

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