Online Stopwatch with Lap Timer
Precise stopwatch with lap tracking and best/worst highlighting.
🔒 Runs entirely in your browser.
How to Use Stopwatch
1
Click Start to begin timing
2
Click Lap to record split times
3
Best and worst laps are highlighted
100% Private
Your files never leave your browser
Instant Processing
No upload wait time. Results in seconds
Zero Limits
No daily limits, no file count limits
Always Free
No account, no subscription, no fees
About This Stopwatch
A precise browser-based stopwatch with centisecond accuracy. Record laps to track intervals — the best and worst laps are automatically highlighted for easy comparison.
Frequently Asked Questions
How accurate is this stopwatch?
It uses requestAnimationFrame for smooth updates and Date.now() for millisecond-level accuracy — comparable to a physical stopwatch.
Can I record laps?
Yes — click the Lap button while running to record split times. The best lap is highlighted green and worst is red.