Professional Online Stopwatch Timer

Providing millisecond precision timing, lap recording, data export features, perfect for study time tracking, sports timing, experiment timing, and more

Millisecond Precision Timing

Using high-precision timing algorithms to ensure timing accuracy at the millisecond level, providing you with the most accurate time measurement results.

Lap Timing Function

Support unlimited lap recording, each lap time calculated independently, total time displayed cumulatively, meeting complex timing needs.

Data Export Function

Support exporting lap data to CSV format, convenient for subsequent analysis and record keeping, improving work efficiency.

Data Persistence

Automatically save timing state and lap data, automatically restore after page refresh, ensuring data is not lost.

Keyboard Shortcuts Support

Support keyboard shortcut operations, Space to start/pause, Enter for lap, R to reset, improving operational efficiency.

Responsive Design

Perfectly adapts to various device screens, from mobile phones to tablets, from laptops to large displays, all providing optimal user experience.

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