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Regex Tester

Test regular expressions with flags and match listing.

Enter details

How to use

  1. Fill in: Pattern, Flags and Test text. Fields with defaults or marked optional can stay as shown.
  2. Tap Test Regex.
  3. Read the result - you can print or save it as PDF.

Worked example

With the default email pattern on "Contact a@b.com or c@d.org":

MATCHES FOUND2

Common questions

What is a regex tester?

A tool that runs a regular expression against your sample text and shows every match, so you can build patterns step by step instead of guessing.

Which regex syntax does this tester use?

JavaScript regular expressions - the matching runs in your browser.

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