Online Stopwatch | Free Timer with Laps, Splits & Countdown

❓ Frequently Asked Questions

Is this stopwatch accurate to milliseconds?

Yes, our online stopwatch uses high-precision JavaScript timing accurate to milliseconds (0.001 seconds). However, actual precision may vary slightly based on your device's processor and browser performance. For scientific or professional sports timing, we recommend using dedicated hardware.

Can I use this stopwatch offline?

Yes! Once loaded, TimeMaster Pro Stopwatch works completely offline. You can install it as a Progressive Web App (PWA) on your phone or computer by clicking 'Add to Home Screen' in your browser menu. It will function without internet connection.

How do I record lap times?

Click the 'Lap' button (or press Spacebar) while the stopwatch is running to record a lap. Each lap shows the split time (time since last lap) and total elapsed time. You can record unlimited laps and export the data later.

Does it work on mobile phones?

Absolutely! Our stopwatch is fully optimized for mobile devices with touch-friendly controls, responsive design, and vibration feedback (on supported devices). It works perfectly on iPhones, Android phones, and tablets.

Can I export my lap times?

Yes, you can export your lap data as CSV or copy it to clipboard. Click the 'Export' button after recording laps to download a spreadsheet-compatible file with all your timing data, including lap numbers, split times, and total times.

Is there a countdown timer feature?

Yes! Switch to 'Countdown' mode to set a target time. The timer will count down to zero and alert you with sound and vibration when complete. Perfect for cooking, workouts, presentations, and time management techniques like Pomodoro.

🎯 Professional Online Stopwatch & Timer

TimeMaster Pro Online Stopwatch is the most advanced free timer tool available on the web. Designed for athletes, coaches, students, chefs, and professionals who demand precision and reliability.

⏱️ Precision Stopwatch Features

Our stopwatch offers millisecond precision timing with an intuitive interface. Record unlimited laps, view split times, and analyze your performance with automatic statistics including fastest, slowest, and average lap times. The large, glowing display is readable from a distance - perfect for gym workouts or sports training.

⏳ Countdown Timer Mode

Switch to countdown mode for interval training, cooking, presentations, or productivity techniques like the Pomodoro method. Set custom times or use quick presets. When time expires, receive audio alerts and vibration notifications (on mobile devices).

🔁 Interval Timer (Coming Soon)

Create custom interval workouts with work/rest periods. Perfect for HIIT training, Tabata protocols, and circuit training. Set unlimited intervals with different durations and get audio cues for each phase.

✨ Why Choose Our Stopwatch?

Millisecond Precision - Accurate timing for professional use
Unlimited Laps - Record as many splits as you need
Data Export - Download CSV or copy to clipboard
Fullscreen Mode - Distraction-free large display
Keyboard Shortcuts - Control without mouse (Space, L, R, F, M)
Works Offline - PWA support for no-internet usage
Mobile Optimized - Perfect on phones and tablets
Sound & Vibration - Alerts when you need them
100% Free - No ads, no registration, no limits

Perfect for: Track & field training, swimming laps, cooking timers, study sessions, presentation timing, workout intervals, race timing, and any situation requiring precise time measurement.

TimeMaster Pro