Stopwatch
Millisecond precision online stopwatch with lap recording and CSV export.
Runs entirely in your browser - your files are never uploaded
What is Stopwatch?
Stopwatch is a free, web-based utility designed for instant, local date & time tools tasks. It allows users to compute, format, convert, or edit data directly in their browser without installing software or registering an account.
- 100% Free & Unlimited Usage
- 0% File Uploads (100% Client-Side Privacy)
- Instant Real-Time Calculations
- Mobile, Tablet & Desktop Compatible
How to use Stopwatch
Select or Enter Input
Provide your source file or type your values into Stopwatch.
Configure Settings
Adjust parameters, formatting options, or units in real-time.
Get Instant Output
Download the final processed file or copy the generated output.
About the Stopwatch
A high-precision browser stopwatch with lap split recording. Ideal for athletic training, speed testing, recipe timing, and workflow audits.
Use keyboard shortcuts (Space to Start/Pause, L to record Lap) for instant control.
Frequently asked questions
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