Pomodoro Timer
Automatic work/break cycles with a session counter and a local chime — unlike a plain countdown, it moves on to the next phase for you.
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How It Works
The technique behind this timer was developed by Francesco Cirillo in the late 1980s, named after the tomato-shaped kitchen timer ("pomodoro" is Italian for tomato) he originally used to track his study sessions. The structure is simple by design: work in a focused block — traditionally 25 minutes — then take a short break, typically 5 minutes. After completing four of these work/short-break cycles, take one longer break, usually 15-30 minutes, before starting the pattern again. This timer automates that entire cycle: set your own work length, short break, long break, and how many sessions trigger the long break, and it moves through each phase on its own, ringing a locally-generated chime at every transition and updating the browser tab title so you can track progress without switching back.
The reasoning behind the structure isn't arbitrary. Human focus and attention operate at peak effectiveness only for a limited stretch of time — sustained, uninterrupted work leads to cognitive fatigue that gradually erodes both speed and accuracy, a pattern well documented in attention research. Regular short breaks interrupt that fatigue build-up before it compounds, and the longer break after four cycles allows deeper mental recovery. The net effect, per the technique's core claim, is more sustainable productivity across a full working day than trying to push through hours of continuous, unbroken focus.
What to Know
- This isn't a plain countdown. A basic countdown timer stops at zero; this one automatically starts the next phase (work → short break → work → … → long break) and keeps a running count of completed sessions.
- Timing is clock-based, not frame-based. It stays accurate even if the browser tab is in the background — only the visible countdown display may pause updating until you switch back, then it catches up instantly.
- The default 25/5 split is a starting point, not a rule. Cirillo's original interval works well for many people, but the ideal work/break ratio varies by task and by individual — the timer lets you adjust every duration.
- The chime is generated locally. No audio file is loaded; the sound is synthesized directly in your browser at each transition.
Frequently Asked Questions
Where does the Pomodoro Technique actually come from?
It was created by Francesco Cirillo in the late 1980s while he was a university student, who used a tomato-shaped kitchen timer to track focused study intervals — "pomodoro" is simply Italian for tomato, and the name stuck even though this timer uses no physical kitchen timer at all.
Why 25 minutes of work and not some other length?
25 minutes was Cirillo's original interval, chosen as a stretch long enough to make real progress on a task but short enough to sustain full attention without the fatigue that builds up over longer uninterrupted stretches. It's a well-tested default, not a fixed law — this timer lets you shorten or lengthen it to fit your own focus span.
Why take a long break only every four sessions instead of every session?
Four work/short-break cycles represent a meaningful chunk of sustained cognitive effort. A short 5-minute break clears momentary fatigue between sessions, but a longer 15-30 minute break after four rounds allows deeper mental recovery before fatigue compounds into the kind of tiredness a short break can't fix.
What actually happens if I just work straight through without breaks?
Attention research generally shows that continuous, unbroken focus leads to accumulating cognitive fatigue — output doesn't stay flat, it gradually degrades in both speed and accuracy the longer the uninterrupted stretch runs. The Pomodoro cycle is built specifically to interrupt that decline before it sets in, which is the core argument for why scheduled breaks tend to outperform pushing through.
Does the timer keep counting accurately if I switch to another browser tab?
Yes. It measures elapsed time against the actual system clock rather than counting animation frames, so the underlying timing stays correct even while the tab is in the background. The countdown you see on screen may not visibly update until you return to the tab, but it immediately shows the correct, caught-up time once you do.
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