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Free Online Stopwatch & Lap Timer

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Lap Split Total

Free Online Stopwatch

StopwatchPro is a free, browser-based stopwatch with millisecond accuracy. No download, no sign-up — just open and time anything instantly.

Lap Timer

Record unlimited laps and instantly see your best and worst splits highlighted in green and red. Perfect for interval training and race analysis.

Works Everywhere

Runs entirely in your browser on desktop, tablet, or mobile. No apps to install. Works offline after the first load.

How to Use StopwatchPro

StopwatchPro is designed to be simple enough that you never need instructions — but here's exactly how each feature works if you want to get the most out of it.

  1. Start timing: Click the Start button or press the Space bar to begin counting. The display updates in real time down to the millisecond.
  2. Record a lap: While the stopwatch is running, click Lap or press "L" to log a split. Each lap shows both its individual time and the running total.

Frequently Asked Questions

Is StopwatchPro really free to use?

Yes. StopwatchPro is completely free with no sign-up, no download, and no hidden fees. It runs directly in your browser.

How accurate is the online stopwatch?

StopwatchPro measures time to the millisecond using your browser's high-resolution timing functions, making it accurate enough for workouts, cooking, races, and lab timing.