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Online Stopwatch
A simple, precise stopwatch with lap timing — start, pause, and reset instantly, right in your browser tab.
100% free, no signup
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Export lap times as CSV/txt
Your files are processed in your browser and never uploaded to any server.
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How to use this tool
- 1Click Start to begin timing.
- 2Click Lap while running to record a split time.
- 3Click Pause to stop, or Reset to clear everything.
- 4Unlock lap export below to save your lap times as a file.
Frequently asked questions
Does it stay accurate if I switch tabs?+
Yes, the timer is based on real elapsed time, not a simple counter, so it stays accurate.
Whether you're timing a workout, a presentation rehearsal, or a cooking step, a stopwatch you can open in one tab without installing an app is genuinely useful. This one tracks time down to the hundredth of a second, supports unlimited laps so you can record splits, and keeps running accurately even if you switch tabs briefly.