How to use the Online Stopwatch
- Click Start (or press Space).
- Click Lap (or press L) to record lap times.
- Click Stop, then Reset to start over.
Keyboard shortcuts
- Space – start / stop
- L – record a lap
- R – reset
How accurate is it?
The stopwatch uses your device’s high-resolution clock and keeps running correctly even if you switch tabs, because it measures elapsed time rather than counting ticks.
Frequently asked questions
Does it keep running if I close the tab?
It keeps running while the page is open in any tab. If you close or reload the page, the running time is restored from your browser storage.
Can I export lap times?
Yes, click “Copy laps” below the lap table.