Online Stopwatch
Millisecond precision · Lap recording
🔒 All data is processed in your browser. Nothing is uploaded to any server.
00:00:00.000
Lap times
Quick guide
What can Stopwatch / Timer help you do?
Free online stopwatch. Millisecond precision, lap recording, CSV export. Perfect for sports, study, cooking.
Best for
Useful for quick file work, text cleanup, calculations, content creation, and website or AI checks.
How to use it
Open the tool, enter or upload what it asks for, then copy or download the result directly.
Privacy and limits
Most tools run in your browser with no sign-in. Very large files or older devices may hit browser memory limits.
Frequently Asked Questions
Can I record laps?
Yes, click Lap during a run to mark a split. Export as CSV for analysis.
Will it persist after close?
No, history is not stored. Use Export CSV to save.
How precise?
Uses performance.now(), millisecond precision.