BrowserTools

Pomodoro Timer

25/5 focus cycles with session tracking

By Guga — BrowserTools maintainer, Tbilisi, Georgia Updated 2026-09-14
Free Private No uploads
What is Pomodoro Timer?

The standard Pomodoro rhythm, with the numbers changed to suit you. Focus, short break and long break lengths are three inputs, defaulting to 25, 5 and 15 minutes, and the timer moves between them automatically: when a focus block ends you get a short break, and after every fourth completed block a long break instead. Two counters track your progress — how many blocks you have finished this session and how much focus time that represents, with a fourth-of-four indicator showing where you are in the cycle. A two-tone chime marks each transition, and Skip jumps straight to the next phase when you would rather not sit out a break. The timer holds a deadline timestamp and polls it four times a second, so a delayed frame shortens nothing and stretches nothing.

A full Pomodoro timer with customizable focus and break lengths, long-break cycling, session counting and gentle sounds. Built to keep you deep in work mode.

Private Pomodoro Timer In Your Browser

Pomodoro Timer is processed locally with client-side JavaScript. Your files never touch a server, and there is no queue to wait in.

Step-by-Step

How to use Pomodoro Timer

1

Set Focus, Short break and Long break minutes in the Settings panel.

2

Press Start on the Focus phase, or click the phase buttons to jump directly to a break.

3

Let the cycle run — it advances automatically and chimes at each change, with a long break every fourth block.

4

Use Skip to move to the next phase immediately, and Reset to clear the session back to focus with the counters at zero.

Key Capabilities
  • The cycle advances on its own: focus to short break, then to focus, with a long break substituted after every fourth completed block.
  • All three phase lengths are editable and clamped to sensible ranges, and edits apply to the phase you are on when the timer is idle.
  • A completed-block counter, total focus time and a fourth-of-four progress marker show how much of a cycle you have done.
  • Timing runs against a stored deadline polled four times a second, so interval jitter does not shorten a block.
Common Use Cases
  • A writer runs four blocks to finish a chapter, using the long break after the fourth as a genuine rest.
  • A student sets a 50-minute focus length to match a lecture or a 15-minute block to match a commute.
  • A developer working through a backlog shortens breaks to five minutes to keep momentum through a morning.
Clear Answers

Frequently Asked Questions

What counts as a completed Pomodoro?
The counter increments when a focus phase reaches zero and the timer switches to a break. Skipping straight out of a focus block does not count it.
Do the settings persist between visits?
No. The three fields start at 25, 5 and 15 each time the page loads, so set them once per session.
Will it play a sound in a background tab?
Reliably at the transition, no. Browsers throttle intervals in hidden tabs, so a long background block may be noticed late. Keep the tab visible if the chime matters.
Can I use something other than 25 minutes?
Yes, and many people do. Longer blocks suit deep work and shorter ones suit tasks with a lot of interruption — the technique is the timed block plus the deliberate break, not the specific numbers.