Stopwatch
Measure drift-free elapsed time, record lap statistics, and save or export sessions locally.
碼錶
00:00.00
鍵盤：空白鍵開始或暫停；L 記錄一圈。
最快
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最慢
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平均
—
圈數 (0)
| # | 計圈 | 碼錶 |
|---|
目前沒有內容。
已儲存工作階段 (0)
所有內容都在瀏覽器本機處理，檔案與資料不會上傳。
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.
