About the Stopwatch
This free online stopwatch measures elapsed time down to the hundredth of a second. Press Start to begin, Lap to record split times, and Reset to clear. Nothing is uploaded — everything runs locally in your browser, so it keeps ticking even offline.
It's handy for workouts, cooking, presentations, speed-runs and lab work. The clean, oversized display stays readable from across the room, and every lap is stored so you can compare splits at a glance.
Features
- Millisecond precision with a large, readable display
- Record unlimited laps with split and total times
- Best and worst laps highlighted automatically
- Runs entirely in your browser and works offline
- Free with no sign-up and privacy-friendly
- Keyboard and touch friendly on any device
How to use the online stopwatch
- Press Start to begin timing immediately.
- Press Lap to record a split without stopping the clock.
- Press Stop to pause, then Start again to resume.
- Press Reset to clear the time and all recorded laps.
Frequently asked questions
Does the stopwatch keep running if I switch tabs?
Yes. The stopwatch is based on real elapsed time, so it stays accurate even if you switch tabs or your device briefly sleeps.
Is the stopwatch accurate to milliseconds?
It displays hundredths of a second using your browser's high-resolution timer, which is more than accurate enough for workouts, cooking and everyday timing.
Do I need to install anything?
No. It runs entirely in your browser with no installation, no account and no uploads.
Will it work offline?
Once the page has loaded, the stopwatch keeps working even without an internet connection.