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Stopwatch

Free online stopwatch with millisecond precision, lap times, and keyboard shortcuts

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About This Tool

A free online stopwatch with millisecond precision, lap time tracking, and keyboard shortcuts. It features start, stop, lap, and reset controls with a clear time display, best and worst lap highlighting, and runs entirely in your browser with no server dependency.

Key Features

Quick Preview

Use Cases

datetime

Frequently Asked Questions

What is the Stopwatch?

A free online stopwatch with millisecond precision, lap times, and keyboard shortcuts. It runs entirely in your browser with no data sent to any server.

How accurate is the stopwatch?

The stopwatch provides millisecond precision using the browser's high-resolution performance timer. The display shows hours, minutes, seconds, and milliseconds. Accuracy depends on your device's timer resolution, typically within a few milliseconds.

Can I record lap times?

Yes. Press the Lap button or use the L key to record a lap time while the stopwatch continues running. Each lap time is displayed in the lap history below the main timer.

What keyboard shortcuts are available?

Press Space to start and stop the timer, and L to record a lap. These shortcuts work globally on the page, allowing you to control the stopwatch without reaching for the mouse during timing sessions.

Does the stopwatch keep running if I switch tabs?

Yes. The stopwatch uses absolute timestamps rather than an interval counter, so it continues to track time accurately even when you switch to other browser tabs or minimize the window.