ShortcutSpace Start/PauseEnter LapR Key Reset
Millisecond precision timing with unlimited lap recording, CSV export, and keyboard shortcuts
High-precision timing algorithms keep accuracy at the millisecond level for reliable measurements.
Record unlimited laps — each split is timed independently while the total keeps running.
Export all lap data to CSV for analysis and record-keeping.
Your timer and lap data are auto-saved and restored after a page refresh.
Space to start/pause, Enter for laps, R to reset — no mouse needed.
Looks great on any screen — phones, tablets, laptops, and wall-mounted displays.
Record study time, improve learning efficiency, develop time management habits
Classroom timing, teaching time management, exam time control
Scientific experiment time recording, data collection time marking
Training time recording, competition result statistics, sports data analysis
The stopwatch uses high-precision timing algorithms with accuracy at the ±10 millisecond level. This meets professional requirements for study timing, sports training, and scientific experiments.
Yes. The lap timing feature lets you record unlimited laps. Each split is timed independently while the total time keeps running. All lap data is displayed in a clear table format.
Yes. Click the "Export Data" button to download all lap records as a CSV file. This is perfect for analysis, record-keeping, or importing into spreadsheet applications.
Yes. Press Space to start/pause, Enter to record a lap, and R to reset. These keyboard shortcuts allow hands-free operation, which is especially useful during sports or experiments.
No. The stopwatch automatically saves your timer state and lap data in the browser. If you accidentally refresh the page, your data will be restored automatically.
Yes, completely free. No registration, no downloads required. Works in any modern browser on phones, tablets, and computers.