Best Productivity Timers for Chrome

Updated October 2026

How to choose a focus timer extension

Five of the six extensions here run Pomodoro-style work and break cycles. ActivityWatch Web Watcher is different: it logs your browser activity for the ActivityWatch desktop app and does not count down work sessions. The differences are in what comes with the timer. Decide first whether you want a timer on its own or a timer tied to a task list.

• Plain timer or to-do list. Marinara and Tomato Clock are timers and little else. Focus To-Do and Pomofocus add a task manager.
• Site blocking. The Pomofocus listing says it includes a website blocker, so check its publisher first. Forest works differently: the vendor says Deep Focus blocks other apps or sites, and leaving lets the tree die.
• Gamification. Forest grows a virtual tree while you focus, and finished sessions add to your forest.
• Stats. Focus To-Do lists time tracking and daily, weekly and monthly statistics. Marinara keeps a session history, and Tomato Clock counts completed intervals. ActivityWatch Web Watcher logs your active tab’s title and URL for the ActivityWatch app.
• Open source. Marinara is open source under the MIT license and Tomato Clock under GPL-3.0, so their code can be read. ActivityWatch Web Watcher is open source under MPL-2.0.

Our picks at a glance

Comparisons and alternatives

• Marinara alternatives: Pomodoro timers with a to-do list, site blocking or a visual nudge

Which is the best Pomodoro timer extension for Chrome?

For a plain Pomodoro timer, pick Marinara. It runs focus sessions with short and long breaks from the toolbar, lets you set every duration, sends desktop and sound alerts, and keeps a session history. It is also open source under MIT. If you want tasks too, choose Focus To-Do.

What is the Pomodoro technique?

The Pomodoro technique is a time-management method. You work on one task for a fixed block, traditionally 25 minutes, then take a short break. After four blocks you take a longer break. The fixed rhythm makes it easier to start work and to notice when you drift. Every extension on this page follows this pattern.

Which focus timer also blocks distracting websites?

The Pomofocus listing says it includes a flexible website blocker that gently prevents you from visiting distracting resources, plus a task manager. We could not show who publishes that listing, so check the publisher name first. Forest takes a different approach: the vendor says Deep Focus blocks other apps or sites, and leaving lets your tree die.

What is the simplest timer with nothing extra?

Tomato Clock is a plain timer. It is open source under GPL-3.0 and runs 25-minute intervals with short breaks and a long break after every four, with pause and resume, notifications, stats and a dark theme. There is no task list and no site blocking. Marinara is a similar choice.

Which extension is best for tracking focus time over time?

Focus To-Do lists time tracking and daily, weekly and monthly statistics, next to its to-do list. It works offline without an account, but sync needs one, and a premium tier exists. For a lighter record, Marinara keeps a session history, and Forest adds finished sessions to your forest.

Is there an extension that logs my browser time automatically?

ActivityWatch Web Watcher. It records the title, URL, audible state and incognito state of your active tab and passes them to the ActivityWatch desktop app, which must be installed and running. It is open source under MPL-2.0. It reads every site you visit, so check its settings before leaving it on. It is a time tracker, not a Pomodoro timer.

Also see: Best Chrome extensions for remote work.