⏱ Stopwatch
Precise online stopwatch with lap and pause support
✓ Runs entirely in your browser — your data never leaves this device
About This Tool
An online stopwatch with 10 ms display precision, pause/resume and lap records — good for workouts, experiments, process tests and speech rehearsal.
How to Use
- Click ▶ to start
- Click Lap to record split times
- Pause, resume or reset at any time
FAQ
How accurate is it?
Based on system timestamps — roughly 10-30 ms, fine for everyday timing.
Do laps persist?
No, refreshing clears them — copy the list if you need to keep it.