Pomodoro Timer
Focus timer with 25-minute work sessions and break intervals.
Use Tool →Timers
Productivity timers based on proven time management research. Our Pomodoro timer implements the technique developed by Francesco Cirillo in the 1980s, with research-backed 25/5 minute work/break intervals. Interval timers support standard protocols like Tabata (20s/10s, Dr. Izumi Tabata, 1996) and customizable HIIT formats. All timers use the Web Audio API (W3C) for precise, reliable alerts.
These timers cover a wide range of daily needs — students using Pomodoro for focused study sessions, fitness enthusiasts timing HIIT and Tabata workouts, public speakers rehearsing with countdown timers, teachers using visual timers for classroom transitions, and anyone practicing guided breathing exercises such as 4-7-8 breathing, a relaxation technique popularized by Dr. Andrew Weil based on pranayama yoga practices.
All timers use requestAnimationFrame paired with performance.now() for drift-free timing accuracy, combined with the Web Audio API (a W3C standard) for reliable sound alerts even when the browser tab is in the background. The visual timer uses an intuitive shrinking-circle display that makes remaining time immediately visible at a glance. The event countdown tracks days, hours, minutes, and seconds until any custom target date you set.
Visual Timer
See time run out with color-coded countdown. 4 modes: circle, bar, sand, text. Fullscreen, classroom presets, keyboard shortcuts.
Use Tool →Interval Timer
Customizable interval training timer for HIIT and workouts.
Use Tool →Stopwatch
Measure elapsed time with lap functionality and millisecond accuracy.
Use Tool →Breathing Timer
Guided breathing exercises like Box Breathing and 4-7-8 for relaxation.
Use Tool →Event Countdown
Count down days, hours, and minutes to your special events.
Use Tool →Frequently Asked Questions
What is the Pomodoro Technique?
The Pomodoro Technique is a time management method developed by Francesco Cirillo in the late 1980s. It uses a timer to break work into 25-minute focused intervals (called 'pomodoros') separated by 5-minute breaks. After four pomodoros, you take a longer 15–30 minute break. The technique is named after the tomato-shaped kitchen timer Cirillo used as a university student.
What is Tabata training?
Tabata is a high-intensity interval training (HIIT) protocol developed by Japanese scientist Dr. Izumi Tabata in 1996. The standard format consists of 20 seconds of maximum-effort exercise followed by 10 seconds of rest, repeated for 8 rounds (4 minutes total). Research published in Medicine & Science in Sports & Exercise showed it improved both aerobic and anaerobic capacity.
Do the timers work offline?
Yes, all timers work offline after the initial page load. They use the Web Audio API (W3C standard) for sound alerts, which works without an internet connection. Your timer settings and history are stored locally in your browser and are never sent to any server.
What is the 4-7-8 breathing technique?
The 4-7-8 breathing pattern (inhale for 4 seconds, hold for 7 seconds, exhale for 8 seconds) was popularized by Dr. Andrew Weil, based on pranayama yoga breathing practices. It activates the parasympathetic nervous system, which can help reduce anxiety and promote sleep. The extended exhale phase slows the heart rate and encourages relaxation. Our breathing timer provides synchronized visual and audio cues to guide you through each phase of the cycle, so you can focus entirely on your breath without watching a clock.
What is a visual timer and who benefits from it?
A visual timer shows remaining time as a shrinking colored circle or bar, making time passage immediately visible without reading numbers. Originally designed for children and individuals with ADHD or autism to understand time concepts more concretely, visual timers are widely used by teachers for classroom transitions, therapists for session management, and professionals who prefer an at-a-glance representation of elapsed time. The intuitive display reduces time-related anxiety by making an abstract concept tangible and predictable.