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
Does it keep running if I switch tabs?
It uses timestamps, so elapsed time remains accurate when the browser keeps the page active.
Can I record laps?
Yes. Stopwatch mode includes lap recording.
Is anything stored?
No. Timer state stays in the current browser page only.
切换标签页还准确吗？
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。
可以记录计圈吗？
可以，秒表模式支持计圈记录。
会保存计时数据吗？
不会，计时状态只保留在当前页面中。
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