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Online Stopwatch & Lap Timer

Processed in your browser

High-precision digital stopwatch with lap and split times, fastest/slowest lap tracking, and CSV export.

Space Start/Pause L Lap R Reset

            00:00:00
            .00
        

            Current Lap:
            00:00.00
        

🏁 Lap Times (0)

Lap #	Lap Time	Total Split	Status
No laps recorded yet. Click Lap while running to mark intervals.

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How to Use the Online Stopwatch & Lap Timer

Measure elapsed time with millisecond precision. Record split and lap intervals with automated fastest and slowest lap highlighting. Export lap times to CSV or clipboard. Includes keyboard shortcuts for hands-free operation.

Privacy & Data Processing Notice

No user data leaves your browser. Computation is executed entirely on your device. We do not store, view, or transmit your inputs over our network. Your computation remains on your personal machine.

Frequently Asked Questions

How accurate is this online stopwatch?

This stopwatch uses the browser's high-resolution Performance API (performance.now()), which provides sub-millisecond timestamps independent of system clock adjustments or background tab drift.

Can I use keyboard shortcuts?

Yes! Press Spacebar to start or pause, 'L' (or Enter) to record a lap interval, and 'R' to reset the stopwatch to zero.

Can I download my recorded lap times?

Yes, click 'Export CSV' to download a spreadsheet-ready file containing lap numbers, individual lap durations, and cumulative split timestamps.

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