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Regex Cheatsheet & Reference

A clean searchable regex cheatsheet. Examples, flags, common patterns, and a live tester.

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A clean searchable regex cheatsheet covering metacharacters, quantifiers, groups, anchors, lookarounds, character classes, and flags. Common-patterns library with copy-ready regex for emails, URLs, phones, IPs, dates, slugs, hex colors, and credit cards. Embedded mini-tester at the top.

When to use it

  • 1Refreshing your memory on a specific regex syntax element.
  • 2Copy-pasting a known good regex for a common pattern.
  • 3Testing a quick pattern without leaving the cheatsheet.

How it works

  1. 1

    Search the reference

    Top search filters the cheatsheet sections live. Click any element for an explanation and a copyable example.

  2. 2

    Browse common patterns

    Grid of named patterns - email, URL, phone, IP, date, slug, hex color, credit card - each with regex, explanation, and example matches.

  3. 3

    Test inline

    Mini-tester at the top: paste a pattern and a string, see matches highlighted.

Frequently asked

Which regex flavor?

JavaScript / ECMAScript. The patterns mostly translate to other engines with minor adjustments.

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