Stopwatch — Precision Timer with Laps

Free, private stopwatch with centisecond precision. Track laps with best/worst/average stats, color-coded results, copy lap data — 100% client-side, no data sent. 100% serverless.

🔒 100% Private
⚡ Completely Free
🌐 Runs in Browser
📦 Export Ready
⚡

Stopwatch — Precision Timer with Laps

Tool Workspace

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  1. Click Start to begin the stopwatch.
  2. Click Lap to record lap times.
  3. Click Stop to pause the timer.
  4. Review laps — best (green) and worst (red) are highlighted.
  5. Copy Laps to export all lap data.

What Is the Stopwatch?

A precision digital stopwatch with lap tracking. Start, stop, and record laps with centisecond accuracy. See best/worst/average lap statistics with color-coded highlighting.

Key Features

  • Centisecond Precision — Updates every 10ms using performance.now().
  • Lap Tracking — Record unlimited laps with cumulative and interval times.
  • Best/Worst Highlighting — Fastest lap in green, slowest in red.
  • Statistics — Best, worst, and average lap times displayed.
  • Copy Laps — Export all lap data as text.
  • 5-Language Support — EN, AR, ES, PT, ZH.

Privacy

100% client-side. No data is sent to any server.

Frequently Asked Questions

How precise is the stopwatch?

The stopwatch uses performance.now() for centisecond (1/100th second) precision. It updates every 10ms for smooth display.

Is my data tracked?

No. Everything runs 100% in your browser. No data is sent to any server.

Can I record multiple laps?

Yes. Click the Lap button while the stopwatch is running to record unlimited laps. Each lap shows cumulative time and the interval since the previous lap.

What do the colors mean?

Green highlights the fastest lap interval, red highlights the slowest. This helps you identify your best and worst performance at a glance.

Can I copy the lap data?

Yes. Click Copy Laps to copy all lap data as text to your clipboard, ready to paste into a spreadsheet or document.

Does it work in the background?

The timer continues counting even if you switch browser tabs. However, the display updates when you return to the tab.

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