Pomodoro Timer

How do you use the Pomodoro timer?

Pick a session, add your tasks, and press Start. This free Pomodoro timer from ÆON Toolhub runs the classic focus-and-break cycle right in your browser, with nothing to install.

1. Pick a session type: Focus, Short break, or Long break.
2. Adjust the length in minutes if you want something other than the classic 25/5/15 split.
3. Add what you are working on to the task list and estimate how many pomodoros it will take.
4. Press Start. The ring fills as time passes, and a sound plays when it hits zero.
5. When a focus session ends, the timer switches to the right break automatically and credits a pomodoro to your current task.

Where does the technique come from?

Francesco Cirillo developed the Pomodoro Technique in the late 1980s as a university student, timing his study sessions with a kitchen timer shaped like a tomato (pomodoro in Italian). The core idea is simple: work in short, uninterrupted bursts, then rest before fatigue sets in. After four bursts, a longer break resets your focus for the next round.

Can I track my tasks?

Yes. The built-in task list lets you add what you are working on and set how many pomodoros you expect each task to take. When a focus session finishes, the timer automatically credits it to your first unfinished task, so the "done out of estimate" count climbs as you work. Check a task off when it is complete, or delete it.

Your tasks are saved in your browser with local storage, so they are still there when you come back, with no account and no signup. Nothing is uploaded to a server; clearing your browser data or deleting a task removes it for good.

Is there a full-screen focus mode?

Yes. Tap Full screen to fill the window with just the timer and your current task, so nothing else competes for your attention during a deep focus block. Press Exit full screen to return to the full panel with your tasks and settings. It is the same timer, simply stripped down to what matters while you concentrate.

How do the sound and notifications work?

A short three-tone beep plays automatically when a session ends, generated in the browser with no audio file to load. If you want an alert even when the tab is in the background, click "Enable desktop notification" once; the browser asks for permission, and every session change after that fires a native notification alongside the sound. You can turn the sound off and keep only notifications, or the reverse.

What can I use it for?

Study for an exam in fixed, measurable blocks instead of an open-ended session. Do writing or coding work that benefits from forced breaks to avoid burnout. Clear a task list one focused sprint at a time. Because the timer counts by real end time, it stays accurate even if you switch tabs, and estimating tasks in pomodoros tends to be more honest than a time guess made in advance.