MARZ.tools

Regex Tester

Build and test regular expressions with live match highlighting.

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About this tool

Write a regular expression and test it against sample text, with live match highlighting, capture groups, and flag toggles.

How to use

  1. Enter your regular expression and flags.
  2. Paste test text into the sample area.
  3. Matches and capture groups are highlighted instantly.

FAQ

Which regex flavor is used?

Native JavaScript RegExp syntax (ECMAScript), the same engine used by browsers and Node.js.

Can I test replacements too?

Yes, enter a replacement pattern to preview the result of String.replace with your regex.

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