Stopwatch

It shows time down to 0.01 seconds (10ms), using the browser's high-precision timer (performance.now), which is accurate enough for typical stopwatch use.

The split is the time elapsed since the previous lap, while the total is the cumulative time from the start to that lap.

Yes. Press Space to toggle start/pause and L to record a lap. This doesn't trigger while a text field is focused.

No. It calculates based on actual elapsed time, so it stays accurate even if you switch to another tab.

No. Refreshing or leaving the page clears the record. All calculations happen entirely in your browser and are never sent to a server.