Free Online Stopwatch

A precise stopwatch that runs in your browser. Start, stop, resume, and record lap times. Uses requestAnimationFrame for smooth, accurate timing. No app to install.

About this tool

This stopwatch uses the browser's high-resolution performance.now() timer for precise timing down to the centisecond.

Centisecond precision timing
Start, stop, and resume
Lap times with split differences
Copy all laps to clipboard
Smooth display using requestAnimationFrame
Works on mobile and desktop

100% free. No signup required. No data collected or sent anywhere.

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