ストップウォッチ

Start, pause, lap, and export splits — lightweight stopwatch in your browser.

No install: measure elapsed time with millisecond display and lap memory.

Record lap splits for running, meetings, or experiments with one click.

Capture split times and copy results for logs, coaching, or research.

Track how long you study per session with laps for each topic block.

High-precision timing with centiseconds for training and informal events.

Time-box discussions and capture segment lengths with lap export.

Measure multi-step recipe stages with laps for each phase.

Simple elapsed-time tool for classroom demos and quick measurements.

Large readable digits for projector use — laps for activities and tests.