Free Pomodoro Timer: 25/5 Focus Cycles With Browser Notifications
Classic 25-minute focus + 5-minute break Pomodoro cycle, with a long break every fourth session. Configurable durations, four built-in presets (Classic, Short Focus, Deep Work, 52/17), browser notifications on phase change. 100% client-side.
🎯 Focus
25:00
Completed work sessions in this cycle: 0 / 4
Classic 25/5 Cycle
Default to Francesco Cirillo's original 1980s timing — 25 minutes of focus, 5 minutes of break, with a 15-minute long break every fourth completed work session.
Four Built-In Presets
Classic Pomodoro, Short Focus (15/3), Deep Work (90/20), and the 52/17 rule (from DeskTime's data study of the most-productive users). One-click switch between methods.
Browser Notifications
When a phase ends, your browser fires a system notification — even if the tab is in the background. Permission requested only when you start the timer; never automatic.
100% Client-Side
No sign-up, no usage tracking, no analytics on your focus sessions. The timer runs entirely in your browser tab.
The Pomodoro Timer That Respects Your Attention Span
Francesco Cirillo invented the Pomodoro Technique in the late 1980s with a tomato-shaped kitchen timer. Forty years later, the method has more empirical support than almost any other consumer productivity technique: short, predictable work intervals followed by deliberate breaks reduce procrastination, slow the onset of decision fatigue, and produce more sustainable output than open-ended grinding. Our Free Online Pomodoro Timer implements the classic 25/5 cycle, the long-break-every-fourth-session rule, and four configurable presets — with browser notifications so you can let the timer run in the background while doing the actual focused work in another window.
Pair this timer with our Age Calculator (when you want to track total productive hours across a year), the Word Counter (for output tracking during writing sessions), the Timestamp Converter (to log session start/end times for analytics), and the Calorie Calculator (energy intake supports focused work as much as time blocks do).
Pomodoro vs Other Time-Management Methods
| Method | Origin | Best For |
|---|---|---|
| Pomodoro (25/5) | Francesco Cirillo (1980s) | General focus work, beginners |
| Ultradian (90/20) | Nathaniel Kleitman (1953) | Deep coding, writing, research |
| 52/17 | DeskTime study (2014) | Empirical optimum from productivity-app data |
| Flowtime | Z. Brown (2014) | Variable-length focus that respects flow state |
| Timeboxing | Microsoft / project-management lineage | Calendar-blocked tasks with hard endings |
Anatomy of a Pomodoro Cycle
1. Decide What to Work On
Pick a single, specific task. “Write the introduction paragraph” beats “work on the article.” Vague intentions invite distraction.
2. Start the Timer (25 min)
No tabs, no notifications, no breaks. If something urgent comes up, write it on a list to handle during the next break — don't derail.
3. Short Break (5 min)
Stand up, stretch, look at something 6+ metres away. Do NOT check social media — that's not a break, it's a different cognitive task.
4. Repeat & Take a Long Break
After four work sessions (~100 minutes), take 15–30 minutes off. Walk outside, eat, talk to someone. Then start the next set of four.
Pomodoro Pitfalls (and How to Avoid Them)
1. Breaking Flow State
If you're in genuine flow at the 25-minute mark, stopping is counterproductive. Switch to a Flowtime approach (variable-length sessions) or use the 90/20 preset for cognitively-deep work.
2. Phone-as-Break
Scrolling Instagram during a break isn't recovery — it's a different stimulating cognitive task. Walk, stretch, or stare out a window instead.
3. Hyperfocus on the Timer
Glancing at the countdown every 30 seconds defeats the purpose. Start the timer, then close the tab (notifications will fire when the phase ends).
4. Mismatching Task to Block Size
25 minutes is plenty for email triage but cramped for writing or complex coding. Use Deep Work (90/20) presets when the task warrants it.