Lap records the time since the previous lap (or start). It is ideal for timing consecutive segments of a race, workout, or repetitive tasks.
Split records the total elapsed time from the start. It is used to mark intermediate times without resetting a new lap. You can use both modes interchangeably.

Yes! Press Space to start/stop, L for next lap, S for split time, and R to reset. Shortcuts work even when buttons are focused.

The timer updates every 10 milliseconds (1/100 second) using the browser's high‑resolution time. Minor display latency depends on your device, but timing precision is suitable for sports, cooking, and professional timing.

Absolutely. The tool is fully client‑side JavaScript; no internet connection is required after the page loads. We do not display any ads or tracking scripts – it’s a free, clean tool for everyone.

To maintain logical consistency, you can only add new lap or split marks while the stopwatch is running. You can record at any time during an active timing session, then pause or reset.

Currently you can manually copy the times from the table. We plan to add a CSV export feature soon. In the meantime, simply select and copy the rows you need.