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Bấm giờ

Stopwatch timer: support start pause reset and laps with milliseconds and history for sports and lab timing, with one-click copy, offline and multilingual.

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Overview

Stopwatch is a Time tool. Support start pause reset and laps with milliseconds and history for sports and lab timing, with one-click copy, offline and multilingual. It runs 100% in your browser with no upload, so you get instant results with privacy. Whether you need a quick answer or batch processing with precise control, you can enter, validate and export in seconds. The UI is responsive on mobile, tablet and desktop and supports one-click copy.

Use cases

  • Daily use of Stopwatch: Press Start to time, Pause and Reset anytime. Precision to 0.01 seconds. — enter and get instant results without manual lookup.
  • One-click copy keeps results ready to save, check or share with family and pros.
  • Use Stopwatch offline or on poor network — all calculations stay local and private.
  • Wake-up and nap alarms that ring on time
  • Countdowns to meetings and deadlines with early warnings

How to use

  1. 1 Press Start to time, Pause and Reset anytime. Precision to 0.01 seconds..
  2. 2 Start and get notified when time is up
  3. 3 Run independent timers across tabs
  4. 4 Save favorite durations for reuse

Highlights

  • Local & private: processing stays in your browser
  • Live validation with tolerant parsing
  • One-click copy and export for docs, code or sheets
  • Batch and offline support under poor network

Notes

  • Locked or battery-saver modes may delay rings
  • Keep the tab open for long timers
  • Check system volume is not muted first

FAQ

Multiple timers?
Yes. Independent timers across tabs.
Ring when locked?
Yes on screen; deep saver modes may delay it.
How is Stopwatch different?
It runs locally with a focus on speed and privacy, plus tolerant parsing for “stopwatch, online stopwatch” and one-click copy for reuse.
Can I use results in official reports?
Use it as a working draft and cross-check with authoritative sources; keep the exported log and parameters for traceability.
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All calculations run locally in your browser; nothing is uploaded.