Pomodoro & Countdown Timer
Stay focused with customizable work/break cycles, or count down to anything with a simple timer — with timestamp-based timing, optional sound and browser notification alerts.
| Mode | Use it for |
|---|---|
| Pomodoro | Cycling focused work sessions with automatic short and long breaks |
| Countdown | Any single timed task — cooking, presentations, exercise intervals |
The timer, sound and notifications all run locally in your browser. Session timing stays in this tab. Optional duration and alert preferences are saved in this browser; no session information is sent to a server.
How to use the Pomodoro timer
- Choose work, short-break and long-break lengths, then select how many focus sessions come before a long break.
- Press Start. Work and break phases alternate automatically while this page can run.
- Pause to stop the clock, Resume to continue, or Skip phase to move on. Reset unlocks the duration settings.
- Use Countdown for a single interval. Both modes can run independently; the tab title gives priority to the Pomodoro clock.
How timestamp-based timing works
Rather than simply counting down once per second, this timer calculates the exact timestamp it should finish at, then continuously checks the current time against that target. When the browser next runs this page, the display catches up instead of losing a second for every delayed tick. A suspended tab or sleeping device can delay the alert and the next phase; the next Pomodoro phase starts when the page is able to run again.
The optional completion sound is generated in your browser using the Web Audio API; there is no audio file to download. Sound availability still depends on your browser and device settings.
Frequently asked questions
Does this timer stay accurate if I switch to another tab?
Yes. Rather than counting ticks, the timer calculates remaining time from the exact moment it should finish, so it catches up when the browser next runs this page. A sleeping device or suspended tab may delay phase changes, sounds and notifications.
Will it alert me when the timer ends?
When enabled and supported, a sound is generated in your browser and an optional notification can appear after you grant permission. Browser audio restrictions, notification settings or a sleeping device can delay or prevent alerts; do not rely on this timer for critical reminders.
Can I customize the Pomodoro work and break durations?
Yes, you can set the work duration, short break, long break, and how many work sessions happen before a long break.
Does this tool send any data to a server?
No, the entire timer runs locally in your browser using JavaScript. Timer settings and session information are not sent to a server.
Do I need to keep the tab open for the timer to work?
Keep this page open. The timer can run in a background tab, but browsers can suspend it and devices can sleep. When this page runs again it catches up; alerts and the next phase can be delayed. Closing or reloading the page ends the current session.
Is this timer free?
Yes, completely free with no account, signup, or usage limit.
Examples and practical checks
Understand the result before using it elsewhere.
- Use a task list and timer without losing your workWorked example · 4 min read
- Explore ProductivityCompare tools and their limits
- How we test these toolsMethods, verification and limitations