Online stopwatch with lap times and countdown timer
Built & maintained by Pappu Venkata Subbi Reddy, founder of Clacify
Clacify's Stopwatch & Timer provides a precise browser-based stopwatch with lap recording and a separate countdown timer. The stopwatch is accurate to milliseconds and records individual lap times — useful for sports training, cooking, presentations, science experiments, and study sessions. The countdown timer lets you set any duration and alerts you when time is up. Works offline once the page is loaded.
Clacify's stopwatch uses JavaScript's performance.now() API for millisecond-level precision. It is accurate to within a few milliseconds on modern browsers — sufficient for most timing needs. For high-precision scientific measurement, use a dedicated hardware stopwatch.
Yes. The stopwatch records lap times individually, making it suitable for sprint training, interval workouts, swimming laps, or any activity where you need to track split times. The display is large and readable, and the buttons are touch-friendly for mobile use.