I needed a clean, no-frills stopwatch for timing workouts, speedcubing and small experiments. Most online timers are bloated with ads or require accounts, so I built my own simple browser-based version.
The name cronometro means stopwatch in Spanish.
Features
- Millisecond precision timing
- Unlimited lap / split time recording
- Fullscreen display mode for big visible digits
- Keyboard shortcut: space to start / pause
- No registration, no ads, no tracking
- Everything runs locally inside your browser
- Works offline once the page finishes loading
No data gets sent to any server. All lap times stay on your device.
It’s useful for:
- Gym & workout timing
- Speedrunning / speedcubing
- Cooking timers
- Classroom or lab experiment timing
- Any quick time measurement task
Try it out here: cronometro.cc
Tech note
This is pure frontend HTML / JS / CSS. No backend, no database. The browser handles all timing logic.
I’m planning small improvements in future updates. What feature should I add next? Lap export? Dark/light theme toggle? Multi timer?
Let me know your feedback in the comments!
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