CSV Sample Extractor
About CSV Sample Extractor
CSV Sample Extractor selects a smaller random subset for previews, tests and exploratory work while always retaining the original header row.
How it works
Counts or percentages
Request an exact number such as 500 or a percentage such as 10%. Requests larger than the source are capped at the available data rows.
Reproducible randomness
Add a seed after a comma to get the same selected rows from the same source on every run. This makes samples suitable for shared test cases and repeatable analysis.
Optional source ordering
Selected rows can be returned in their original relative order for easier comparison, or in seeded shuffle order when the toggle is disabled.
Frequently asked questions
Is the header included in the requested count?
No. The count applies only to data rows; the header is always added separately.
Is this suitable for cryptographic random selection?
No. The generator prioritizes deterministic reproducibility, not cryptographic unpredictability.
Does sampling upload the full dataset?
No. Selection and rendering run locally in your browser.
Sources & last verified
The behaviour of this tool and the claims on this page were checked against the specifications below on . Everything runs in your browser, so the output you see is exactly what the engine produced.
Found a wrong result or an outdated claim? Report an error and it will be re-verified.