Free tool · No sign-up

Online Stopwatch

Press start and this stopwatch counts up in hundredths of a second, with a lap button that records each split alongside the running total and flags your fastest and slowest laps. Pause and resume as often as you like, or reset to clear everything. It runs entirely in your browser: free, instant, and no sign-up.

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Runs entirely in your browser — nothing is uploaded and nothing is saved, so reloading the page clears the time and your laps. Keep this tab open while the stopwatch runs.

Frequently asked questions

Tap Lap while the stopwatch is running and it records the time at that moment. Each row shows the split — the time since your previous lap — next to the total elapsed time, so you can compare intervals without doing the subtraction yourself.

This one measures against the browser's monotonic high-resolution clock and displays hundredths of a second, so it does not drift and is not affected by your system clock changing. Your own reaction time on the start and stop taps is realistically the larger source of error.

Yes. It calculates elapsed time from a start timestamp rather than counting ticks, so a background tab that throttles timers shows the correct time as soon as you return. Keep the tab open — closing it clears the stopwatch.

No — nothing is uploaded or stored. The time and laps live only in the page, so reloading clears them. Use the copy button to keep a record of your laps before you reset.