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Online Stopwatch

Run a browser stopwatch with pause, reset, lap times, and fullscreen mode. Timing remains on your device.

TODO-i18n: this tool's instructions and FAQs are currently available in English.

ツール操作エリア

アカウント不要

Calculations run locally in your browser. No account or server-side calculation is needed.

Use Start/Pause, record lap times, reset, or enter fullscreen mode.

00:00.00

Online Stopwatchとは

Run a browser stopwatch with pause, reset, lap times, and fullscreen mode. Timing remains on your device.

使い方

Run a browser stopwatch with pause, reset, lap times, and fullscreen mode. Timing remains on your device.

よくある用途

Run a browser stopwatch with pause, reset, lap times, and fullscreen mode. Timing remains on your device.

利用上の注意

Run a browser stopwatch with pause, reset, lap times, and fullscreen mode. Timing remains on your device.

よくある質問

Online Stopwatchとは: Run a browser stopwatch with pause, reset, lap times, and fullscreen mode. Timing remains on your device.