What if a row does not match?

Non-matching rows produce empty strings in the extracted columns.

Regex Extractor

Extract data from CSV columns using regular expressions. Capture groups to new columns. Processed entirely in your browser fo

Your files never leave your device. Processed locally. 100% private.

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Complete your task perfectly in just three straightforward steps.

Drop your CSV file.

Enter a regex pattern with capture groups. Select the source column.

Download the CSV with extracted groups as new columns.

Everything you need to know about the Regex Extractor.

What regex syntax is supported?

JavaScript regex syntax — including lookaheads, named groups, and Unicode.

Can I extract multiple groups?

Yes — each capture group becomes a separate output column.

Is my file uploaded?

No. Everything runs locally in your browser.

File size limit?

Process files up to the browser memory limit.

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