Pomodoro Timer

The Pomodoro Technique is a time-management method developed by Francesco Cirillo in the late 1980s, named after the tomato-shaped kitchen timer ('pomodoro' in Italian) he used as a university student. The core idea is simple but surprisingly effective: you work in focused, uninterrupted blocks of 25 minutes (one 'pomodoro'), then take a short 5-minute break. After four pomodoros, you take a longer break of 15–30 minutes before starting the cycle again. This rhythm is designed to work with, rather than against, the brain's natural attention span — most people can sustain deep focus for roughly 20–30 minutes before concentration starts to fray, and the enforced short break between sessions prevents the creeping mental fatigue that makes a three-hour uninterrupted grind actually less productive than three separate 25-minute blocks with real rests between them. The break is not an afterthought — it is the mechanism that makes the technique sustainable. The promise of an approaching break makes it easier to resist the urge to check a notification or switch tabs mid-session, because you know a legitimate pause is coming soon. The short break also gives your brain a chance to process what you just worked on in the background (the 'diffuse mode' of thinking that often produces the solution to a problem you were stuck on during the focused session), and the longer break after four cycles prevents the cumulative burnout that comes from pushing through for hours without proper rest. This timer automates the alternation between phases so you do not have to manage it manually. You can adjust the durations to suit your own rhythm — some people prefer 45- or 50-minute focus blocks, others find 20 minutes works better for creative work — as well as the number of sessions before the long break kicks in. The timer runs entirely in your browser using JavaScript's setInterval, updating the display every second. Nothing you set is transmitted, stored, or shared — the timer, the session counter and the phase transitions all stay local to your device. Two practical notes worth being aware of. First, browser tabs that are in the background for long periods may have their timers throttled by the browser's own power-saving behaviour — the Pomodoro Timer will catch up when you return to the tab, and in most modern browsers an active audio indicator or a visible timer display will prevent throttling during short focus sessions. Second, this is a concentration tool, not a precise scientific instrument — it is built for the human-scale rhythm of working and resting, not for timing experiments or sub-second accuracy.