Stopwatch & Timer秒表与倒计时
Run a stopwatch with laps or a countdown timer directly in your browser.在浏览器中使用秒表计圈或倒计时计时器。
Your files are processed entirely in your browser. Nothing is uploaded to any server.所有文件均在浏览器本地处理，不会上传到服务器。
About this tool工具说明
Run a stopwatch with laps or a countdown timer directly in your browser. Works directly in your browser - no software to install, no account required, completely free.在浏览器中使用秒表计圈或倒计时计时器。
FAQ常见问题
It uses timestamps, so elapsed time remains accurate when the browser keeps the page active.
Yes. Stopwatch mode includes lap recording.
No. Timer state stays in the current browser page only.
工具使用时间戳计算，只要页面保持活动，经过时间仍然准确。
可以，秒表模式支持计圈记录。
不会，计时状态只保留在当前页面中。
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