Online Stopwatch & Countdown Timer
Precise stopwatch with lap tracking and countdown timer — works on any device.
About This Online Stopwatch
This stopwatch runs directly in your browser with millisecond precision. Use it for timing workouts, cooking, presentations, interviews, or any task that needs accurate time measurement. The lap feature lets you record split times, and it automatically highlights your fastest and slowest laps. The countdown timer lets you set hours, minutes, and seconds and alerts you when time is up.
Click Start to begin timing, Stop to pause, and Reset to return to zero. The lap button records split times without stopping the clock.
Yes — the stopwatch uses JavaScript's performance.now() API which provides millisecond precision. It is as accurate as any digital stopwatch for timing purposes.
Yes — the stopwatch is fully responsive and works on any device including phones and tablets. No app download needed.