productivityDifficulty: 2/5
Online Stopwatch with Laps
A precise online stopwatch with lap times. Keeps accurate time even in a background tab. Runs entirely in your browser with nothing to install.
00:00.00
Ready to start
Stopwatch reset
How it works
- Press Start to begin timing. The clock uses real timestamps, so it stays accurate.
- Press Lap while running to record a split without stopping the clock.
- Pause and resume as needed; paused time is excluded. Reset clears everything.
Frequently Asked Questions
Does the stopwatch keep running if I switch tabs?
Yes. Elapsed time is calculated from timestamps rather than counted tick by tick, so it stays accurate even when the browser throttles background tabs.
Can I record lap times?
Yes. Press Lap while running to record a split; every lap and its duration is listed.
Is anything saved or uploaded?
No. The stopwatch runs entirely in your browser and no data is sent anywhere.