Regex Pattern Library & Cheatsheet

Regex • 100% Client-Side Processing

Curated library of verified regular expression patterns. Includes battle-tested expressions for email addresses, RFC 3986 URLs, ISO dates, credit cards, and alphanumeric slugs.

Privacy First: Regex Pattern Library & Cheatsheet executes 100% locally in your web browser. No inputs or generated outputs leave your device.

Zero Server Transmission

Input Data

Output Result

Tool Chaining — Continue Workflow

Take your result from Regex Pattern Library & Cheatsheet directly into companion utilities:

Regular Expression Tester & Debugger Regex String Escape Helper

How to Use

Browse categories or search for patterns.
Click Copy Pattern to use in your code.

Key Features

•Email, URL, IP, UUID, Date, and Phone patterns
•One-click copy to clipboard
•Explanation for each regex

Technical Scope & Limitations

• Always test with your specific application constraints.