Stopwatch
Measure drift-free elapsed time, record lap statistics, and save or export sessions locally.
秒表
00:00.00
键盘：空格开始或暂停；L 记录一圈。
最快
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最慢
—
平均
—
圈数 (0)
| # | 计圈 | 秒表 |
|---|
暂无内容。
已保存会话 (0)
所有内容均在浏览器本地处理，文件和数据不会上传。
Accurate elapsed time
This stopwatch calculates elapsed time from timestamps, so background-tab throttling does not make the clock drift. Record laps, compare fastest and slowest splits, and resume after a reload.
How to use
- 1.Start the stopwatch and record laps as needed.
- 2.Pause or resume without losing elapsed time.
- 3.Name and save a session, then export history as JSON or CSV.
Local floating display
Saved sessions remain in local browser storage. Document Picture-in-Picture provides a floating display where supported, with an in-page fallback everywhere else.
