Professional Stopwatch & Interval Timer
Free online stopwatch with lap timer, HIIT intervals, and workout timing. Perfect for athletes, coaches, students, and professionals.
All the Timing Tools You Need
Basic Stopwatch
Millisecond precision stopwatch with start, stop, pause, and reset. Perfect for timing any activity.
Try itLap Timer
Record unlimited laps with split times. Track fastest and slowest laps, export data to CSV.
Try itInterval Timer (HIIT/Tabata)
HIIT and Tabata presets with custom intervals. Audio cues, visual progress, and voice announcements.
Try itCountdown Stopwatch
Set a target time and count down to zero. Track overtime with negative time display.
Try itHistory & Analytics
Automatically save all timing sessions. View statistics, filter by date, and export your history.
View HistoryWorkout Templates
Pre-built interval templates for popular workouts. Tabata, HIIT, circuit training, and more.
Browse TemplatesWhy Choose StopwatchPro?
Millisecond Precision
Accurate timing down to milliseconds for professional results
Mobile Optimized
Works perfectly on all devices with large touch-friendly buttons
Privacy First
All data stored locally in your browser. No accounts required.
Free Forever
No ads, no subscription, no hidden fees. Always free to use.
Perfect For Every Use Case
Athletes & Fitness
- • HIIT and Tabata workouts
- • Sprint and lap timing
- • Circuit training sessions
- • Marathon training splits
Students & Professionals
- • Study session tracking
- • Exam timing practice
- • Presentation rehearsal
- • Task time tracking
Coaches & Trainers
- • Training drill timing
- • Multiple athlete tracking
- • Workout program timing
- • Performance analytics
Need more productivity tools? Check out pdfcombiner.app for additional time management resources.
Start Timing Now
No signup required. No installation needed. Just open and start timing.
Launch Stopwatch