Lap entries stay below the primary clock so the running time remains the most visible number on the page.
online stopwatch
A precise stopwatch with clean lap timing.
Start, pause, reset, and capture laps from a large millisecond display that updates with requestAnimationFrame.
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The stopwatch is fully client-side and does not send timing data anywhere.
How to use the Online Stopwatch
- 1
Press start to begin timing.
- 2
Use lap to capture intermediate times.
- 3
Pause or reset the stopwatch when finished.
Frequently asked questions
Does the stopwatch keep running after I close the page?
No. The stopwatch is intended for active browser use and resets if the page is closed.
How precise is the online stopwatch?
The display uses requestAnimationFrame and browser timing APIs for smooth millisecond updates while the page is active.
Can I save lap times?
Lap times remain visible during the session, and the latest stopwatch state is saved locally for reloads.
Does the stopwatch upload timing data?
No. Stopwatch timing and laps stay in the browser.
Can I share the stopwatch page?
Yes. Use the copy link button to share the current page URL.
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