Toolbox / Chronometer Runs in your browser中文
Measurement

Chronometer

Measure elapsed time with a monotonic clock; start, pause, resume, reset, and record laps.

Ctrl / ⌘ + Enter Run

Ready when you are

Less switching. More focus.Functional build · Validation in progress

Using this tool

Measure elapsed time on the current page, pause, resume, and record cumulative laps.

Example

No text input: click Start, pause after a short wait, then Reset; elapsed readings depend on how long you wait.

Example action and settings

Action: Start → Pause → Reset

Input / action

Result / expected behavior

The reading increases after Start, holds after Pause, and Reset shows 00:00:00.00 with no laps.

Scope and limitations

  • Laps record cumulative time, not split durations; leaving the tool stops its display updates.

Common mistakes

  • Resume after pausing to time again; Reset clears all laps.

Related tools

ETA calculator Benchmark builder

Privacy and browser support

Input is processed in this browser. Do not use real keys or active sensitive credentials as demonstration data. Device features require browser support and your permission.