How to Use the Online Stopwatch

Press Start on the online stopwatch to begin timing, Lap to record a split without stopping the clock, and Stop when you're done. Reset clears everything for a fresh run.

Time is tracked down to the millisecond, and each lap captures the total elapsed time at that moment so you can compare pace across laps.

You can customize the stopwatch's appearance, including accent color, font, and digit size, from the settings sidebar, and these are saved automatically for your next visit.

The online stopwatch will not run if you close this browser tab or shut down your computer, but it works fully offline once the page has loaded.

Recorded laps stay on screen until you press Reset, so you can review a full set of splits before starting your next run.