Thunder Tools

Pomodoro Timer

This Pomodoro timer alternates focused work sessions with short and long breaks to help you stay productive without burning out — fully configurable, with an audible alert when each session ends.

Focus 25:00 Completed sessions: 0
Work duration (minutes)
Short break duration (minutes)
Long break duration (minutes)
Long break after (sessions)

How it works

Press "Start" to begin a work session. When the countdown reaches zero you'll hear a beep and the timer switches to a short break — after the number of work sessions you configure, it switches to a longer break instead. Press "Start" again whenever you're ready for the next session.

Tip

The classic Pomodoro technique uses 25-minute work sessions with 5-minute short breaks and a 15-minute long break every 4 sessions — but feel free to adjust the durations below to fit your own rhythm.

Will the countdown stay accurate if I switch tabs?

Yes. The timer is calculated from the real end time rather than counted down tick by tick, so the displayed time is always correct even if the tab was in the background.

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