Stopwatch
Simple stopwatch with lap timing.
How to use
- Press Start to begin timing or hit the spacebar for hands-free control.
- Tap Lap to record a split without stopping the running clock.
- Use Pause to freeze the display, then Start again to resume from the same moment.
- Press Reset to clear the current time and lap history when you are done.
- Copy or export your laps if you need to share or save them.
Frequently asked questions
How accurate is this stopwatch?
It uses performance.now() under the hood and is accurate to the millisecond. Tiny drift can occur on background tabs because browsers throttle inactive timers, so keep the tab active for the most precise reading.
Do my lap times survive a page refresh?
No. The stopwatch runs entirely in your browser memory, so refreshing the page clears all timing data. Copy or export your laps before you leave the page if you need to keep them.
Can I use keyboard shortcuts?
Yes. Spacebar starts and pauses, L records a lap, and R resets. This makes it easy to time things hands-free during a workout or experiment.
Does the stopwatch keep running with the tab in the background?
The timer continues, but browser tabs that lose focus are throttled by the OS, so the visible display may update less often. The elapsed time is recalculated correctly when you come back to the tab.
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