Stopwatch & Lap Analyzer
Capture laps, compare split times, undo the last lap and export a complete timing report.
Private by design
Your inputs stay on your device and are not sent to our servers. Optional usage analytics does not receive your files or tool inputs.
How to use Stopwatch & Lap Analyzer
- Start the stopwatch and tap Lap at each boundary.
- Pause/resume, undo the last lap and optionally exclude the first split from comparisons.
- Pause before exporting all lap data or a summary report. Reset starts a fresh run.
What are the limits of Stopwatch & Lap Analyzer?
Up to seven days elapsed and 1,000 laps. Uses performance.now monotonic timing rather than a drifting tick counter. The display shows hundredths; CSV retains rounded captured milliseconds. Browser precision and device sleep can affect measurements; this is not certified timing equipment. First-lap exclusion changes comparison statistics only. Undo restores the preceding lap boundary while total elapsed time continues. Pause before Reset or exporting a consistent report. Reload clears the stopwatch. Entries, names, booking references, notes and timer state stay in browser memory. No uploads, account connections, external model calls or automatic storage. Refreshing clears the workspace; explicitly save a draft or export to keep your work. Downloaded reports contain entered information. No messages are sent to clients, colleagues or travel providers.