Pomodoro Timer
A simple Pomodoro timer with configurable work and break intervals, a completion count, and an audible chime. Runs entirely in your browser.
Pure browser JavaScript (setInterval + AudioContext) — no libraries required.
How to use this tool
- Set your work and break lengths.
- Click Start to begin a session.
- The timer switches automatically between work and break.
A simple Pomodoro timer with configurable work and break intervals, a completion count, and an audible chime. Runs entirely in your browser.
How it works
The Pomodoro Timer implements the Pomodoro Technique, a time-management method that breaks work into focused intervals (typically 25 minutes) separated by short breaks (typically 5 minutes). After four work intervals, a longer break (15-30 minutes) is taken. This rhythm helps sustain concentration and combat mental fatigue.
Work and break durations are fully configurable. Enter your preferred times, click Start, and the countdown begins. An audible chime sounds at the end of each interval so you do not need to watch the screen. The completed Pomodoro count is displayed throughout the session.
The timer runs in your browser using the page's JavaScript engine. Keep the tab open in the background while you work; the chime will still play when an interval ends. No app installation, account, or subscription is required.
Research on the Pomodoro Technique suggests it improves focus by creating a sense of urgency within each interval and making breaks guilt-free. The session count also gives a concrete record of productive time that can help with project estimation.
Worked example
Complete a writing task using four Pomodoros
- Set work interval to 25 minutes and short break to 5 minutes.
- Click Start and write without switching tabs until the chime sounds.
- Take a 5-minute break away from the screen.
- Click Start again for the next interval.
- After 4 intervals, take a 15-minute long break.
Two hours of structured work broken into four focused sessions, with built-in rest to maintain quality.
Common mistakes to avoid
- Ignoring the chime and continuing to work through the break — the break is a required part of the method, not optional.
- Setting intervals too long (e.g. 90 minutes) for your first session; start with the default 25 minutes and adjust once you have a feel for the rhythm.
- Checking notifications or email during the work interval — the technique only works if the interval is truly uninterrupted focus time.
Key terms
- Pomodoro
- Italian for 'tomato'; the name of the time-management technique (named after a tomato-shaped kitchen timer) and the term for one completed work interval.
- Work interval
- The focused, uninterrupted work period in a Pomodoro session, traditionally 25 minutes.
Frequently asked questions
- What is the Pomodoro Technique?
- A time-management method that breaks work into 25-minute focused sessions separated by short breaks to improve concentration and reduce mental fatigue.