Online Stopwatch
A stopwatch that records lap times, accurate to the hundredth of a second.
Runs entirely in your browser.
Stopwatch With Lap Times
00:00.00
About Online Stopwatch
Start, stop, and record a lap at any point. Each lap shows both its own duration and the total elapsed time, so you can see a split without doing the subtraction.
The elapsed time is worked out from the clock rather than by counting frames, so it stays accurate even if the tab is throttled in the background or the display drops frames. A timer built by adding 10 milliseconds per tick drifts noticeably within a minute; this does not.
Other Developer Utilities
- JavaScript Key Code Info — event.key, code and keyCode
- Docker Run to Compose — convert a run command
- ASCII Text Art — large letters for banners
- Device Information — screen, browser and capabilities
- SVG Placeholder Generator — vector placeholder images
- Placeholder Image — a raster PNG or JPG placeholder
- User Agent Parser — break down a UA string
- Responsive Tester — preview a page at many sizes
- Dockerfile Generator — build a Dockerfile
- Live Code Preview — edit HTML, CSS and JS together
