Online Stopwatch

Accurate Timing, Background-Safe

This stopwatch calculates elapsed time from actual timestamps rather than counting animation frames, which means it stays accurate even if you switch browser tabs or the page loses focus temporarily -- a common reliability issue with less carefully built timer implementations.

Laps Without Interrupting the Overall Timer

Recording a lap captures the current elapsed time as a marked segment while the main stopwatch keeps running uninterrupted, letting you track both overall session duration and individual interval times simultaneously -- useful for workouts, cooking steps, or any multi-stage timed activity.