Online Stopwatch

Time anything with a precise stopwatch that records laps and splits — with keyboard shortcuts and CSV export.

FreeNo sign-upRuns in your browserMobile-friendly

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What does the Stopwatch do?

Start, pause and resume with one button, and record laps to capture each segment’s time and the running total. Timing uses the browser’s high-resolution clock, so accuracy is not affected by how often the screen refreshes.

On a computer press Space to start or pause, L for a lap and R to reset. Download laps as CSV to keep a record.

How to use the Stopwatch

  1. Click Start (or press Space).
  2. Click Lap (or press L) to record splits.
  3. Pause and resume as needed.
  4. Download laps or Reset.

Examples

Running

Record each 400 m lap to compare pace across a 1.6 km run.

Common use cases

  • Sports and workouts
  • Timing presentations and speeches
  • Cooking and experiments
  • Classroom activities

Features and benefits

  • Private by design — your data is processed on your device and never uploaded.
  • Free with no account, no watermark and no usage limits.
  • Works on phones, tablets and desktops in any modern browser.

Limitations to know

  • If the tab is closed or reloaded, the time is lost.
  • Some phones pause background tabs — keep the page open for long timings.

Frequently asked questions

How accurate is it?

It uses a high-resolution timer accurate to milliseconds; the display shows hundredths.

Does it keep running in the background?

The elapsed time is calculated from timestamps, so it stays correct even if the display pauses.

Can I save laps?

Yes, download them as CSV.

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