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Shortcuts & tips

Stopwatch: Space start/pause, L lap, Z undo lap, R reset, F fullscreen.

Timer: Space start/pause, R reset.

Pomodoro: Space start/pause, N next phase, R reset.

Student Mode: Space start/pause, R reset, F focus.

Clock: F focus mode.

Disclaimer

The information and tools provided on Cronometro Online are for general utility and informational purposes only.

Timing accuracy

While we aim to provide clear and useful stopwatch, timer, and clock tools, results may vary depending on your device, browser, operating system, background activity, tab state, battery settings, and other technical factors. For official sports timing, medical, scientific, safety-critical, legal, or professional uses where precise certified timing is required, use appropriate certified equipment or services.

No professional advice

Content on this site is not professional, legal, medical, or safety advice. You are responsible for how you use the tools and for verifying suitability for your specific situation.

Privacy

We do not collect users’ personal information through the core timing tools. Some optional settings or saved sessions may be stored locally in your browser on your device for convenience.

External factors

We are not responsible for issues caused by third-party services, browser extensions, device settings, network conditions, or other factors outside our control.