Stopwatch

Measure drift-free elapsed time, record lap statistics, and save or export sessions locally.

Stopwatch

00:00.00
Keyboard: Space starts or pauses; L records a lap.
Fastest
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Slowest
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Average
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Laps (0)

#LapStopwatch

Nothing here yet.

Saved sessions (0)

Processed locally in your browser. Your files and data are not uploaded.

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Accurate elapsed time

This stopwatch calculates elapsed time from timestamps, so background-tab throttling does not make the clock drift. Record laps, compare fastest and slowest splits, and resume after a reload.

How to use
  1. 1.Start the stopwatch and record laps as needed.
  2. 2.Pause or resume without losing elapsed time.
  3. 3.Name and save a session, then export history as JSON or CSV.
Local floating display

Saved sessions remain in local browser storage. Document Picture-in-Picture provides a floating display where supported, with an in-page fallback everywhere else.