The Pomodoro technique breaks work into focused sprints separated by short breaks. This timer runs a work session (25 minutes by default), then automatically switches to a break (5 minutes by default), and keeps alternating. Both lengths are adjustable, so you can tune the rhythm to whatever keeps you productive. Start and Pause share one button; Reset returns to a fresh work session and clears the current phase.
Each time a work session finishes, the completed-pomodoro counter goes up, giving you a simple tally of focused blocks for the day. When a phase ends the page shows a clear prompt telling you to switch between focusing and resting, and the title colour changes to match. The timer is pure client-side JavaScript, uses a one-second interval that is cleared on pause, reset and page unload, and never sends anything to a server.