Stopwatch & Timer
Precision stopwatch and countdown timer with lap tracking.
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A high-precision stopwatch with lap tracking powered by performance.now() for sub-millisecond accuracy. Record laps, compare best and worst lap times, and export your session data. Perfect for sports, cooking, and productivity tracking.
Key Features
Sub-millisecond precision
Uses performance.now() and requestAnimationFrame for accuracy far beyond setInterval.
Lap tracking
Record unlimited laps during a session. Best and worst laps are highlighted in green and red.
Pause and resume
Accurately accumulates elapsed time across multiple pause/resume cycles without drift.
HH:MM:SS.cs display
Shows time in hours, minutes, seconds, and centiseconds for all practical timing needs.
How to Use
- 1Press Start to begin timing.
- 2Press Lap to record a split time at any moment.
- 3Press Pause and Resume to interrupt without losing time.
- 4Press Reset to clear and start over.