Regex

Regex Group Extractor

Extract numbered and named JavaScript regex capture values per match, keeping empty and unmatched groups distinct.

Keep this tool in your workbenchReport a problem

Extracted groups

Your result will appear here.

Uses your browser’s JavaScript RegExp engine. Positions and lengths are zero-based UTF-16 code units; end positions are exclusive. Without g, matching returns only the first match. Sticky y starts at position 0.

Limits: 16,384 pattern code units, 200,000 text code units, 2,000 matches or split parts, and 4,000,000 output code units. User regex execution requires a local worker with a 1,500 ms timeout. Oversized results fail rather than being truncated.

Processed locally in your browser. Inputs and results are not uploaded or saved by this page.

Loading JavaScript Regex controls…

What does this tool do?

Extract numbered and named JavaScript regex capture values per match, keeping empty and unmatched groups distinct. Code Station Regex tools use the JavaScript regular expression engine. Inputs: Regex Pattern, Test text, Flags. Outputs: Extracted groups.

How to use it?

Enter a pattern containing capture groups and the text to extract them from. Choose “Extract groups”, then copy individual result values if needed. Clear removes all inputs and results and restores option defaults.