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Regex Extractor

Apply a regular expression to text and extract every match.

Developer Tools Runs in your browser

What is a regex extractor?

Write a pattern, paste a haystack, and every full match comes back one per line. The g flag is applied for you; add i, m, s, u or y as needed. A malformed pattern shows the engine’s error message instead of a blank screen. Matching happens in page-local JavaScript, worth knowing when the haystack is a production log.

How to use the Regex Extractor

  1. 1 Enter a pattern plus any flags beyond the built-in g.
  2. 2 Paste the text to search beneath it.
  3. 3 Full matches list one per line; a bad pattern shows the parser error instead.
  4. 4 Copy whichever matches you need.

What you can use it for

  • Pulling all matches of a custom pattern from a log.
  • Extracting IDs or codes that follow a known shape.
  • Testing a pattern against sample data quickly.
  • Harvesting structured fragments from messy text.

Frequently asked questions

Which flags does the extractor accept?
You can add i, m, s, u and y; g is always on because the point is scanning the whole input. Letters that are not valid flags are dropped without an error.
Can I extract just a capture group instead of the whole match?
Not here. Each output line is the complete match. The regex tester shows groups individually when you need to inspect $1 and $2 on their own.
What do I see if my pattern has a syntax error?
The JavaScript engine’s own message appears in place of results, so a missing bracket or an unterminated group is named and you can correct the expression.

Related tools

Regex Tester Test a regex against text and see match positions and groups. Regex Generator Generate a regular expression from a sample string automatically. String Extractor Extract quoted strings from code or text, quotes stripped.

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