Stopwatch
Measure elapsed time with millisecond precision, record lap splits, and export your running times for sports, research, or productivity.
Trigger Start
Click play or tap Spacebar to trigger the high-resolution timer baseline.
Record Laps
Hit the lap key to record splits without stopping the stopwatch count.
Pause & Resume
Pause to check readings. Tap again to resume capturing elapsed periods.
Reset & Export
Reset standard counters and export lap arrays into spreadsheet sheets.
Your Privacy Matters
All processing stays in your browser
No Server Uploads
Files never leave your device
Auto-Cleared
Data removed when you close
Precision Stopwatch Features
Millisecond Timing Offsets
Uses high-resolution system performance APIs to record timing offsets down to the millisecond.
Unlimited Laps Split Lists
Stamp as many lap intervals as required, displaying individual split differences and total duration trends.
Keyboard Shortcuts Control
Control stopwatch execution via standard keys: Spacebar to toggle start/pause, and Enter or L key to record laps.
Export Laps Split Lists
Download splits, lap timings, and relative differentials as standard CSV or TXT sheets with a single click.
Completely Local Timer Resolution
All split times, lap registers, and stopwatch triggers are processed strictly inside your local browser page. No timing data is sent to external databases.