Stopwatch
00:00:00.00

ShortcutSpace Start/PauseEnter LapR Key Reset

Professional Online Stopwatch Timer

Millisecond precision timing with unlimited lap recording, CSV export, and keyboard shortcuts

Millisecond Precision Timing

High-precision timing algorithms keep accuracy at the millisecond level for reliable measurements.

Lap Timing Function

Record unlimited laps — each split is timed independently while the total keeps running.

Data Export Function

Export all lap data to CSV for analysis and record-keeping.

Data Persistence

Your timer and lap data are auto-saved and restored after a page refresh.

Keyboard Shortcuts Support

Space to start/pause, Enter for laps, R to reset — no mouse needed.

Responsive Design

Looks great on any screen — phones, tablets, laptops, and wall-mounted displays.

Why Choose Our Online Stopwatch?

Technical Advantages

  • Built with modern web technologies, excellent performance, precise timing
  • Using high-precision timing algorithms, error control at millisecond level
  • No download or installation required, ready to use, cross-platform compatible
  • Professional development team, continuously optimizing user experience

Ultimate Experience

  • Simple and beautiful interface design, highlighting time display
  • Large font display, easy to view from a distance
  • Intuitive operation buttons, easy to use
  • Free to use, no registration, no login required