Regex Cheat Sheets

Comprehensive regular expression references for all major programming languages. Master regex patterns, syntax, and examples with our detailed cheat sheets.

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JavaScript

Master JavaScript regex patterns for web development

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Java

Java regex patterns with Pattern and Matcher classes

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Python

Complete Python regex guide with re module examples

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Go

Go regex patterns with regexp package functions

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Rust

Rust regex patterns with performance optimization

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.NET/C#

C# regex patterns with Regex class methods

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PCRE

Perl Compatible Regular Expressions reference

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PCRE2

Advanced PCRE2 patterns and features

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What You'll Find in Our Cheat Sheets

Essential Patterns

  • • Character classes and ranges
  • • Quantifiers and repetition
  • • Anchors and boundaries
  • • Groups and capturing

Language-Specific Features

  • • Syntax variations
  • • Built-in functions
  • • Performance tips
  • • Common use cases

Need More Help?

Try our interactive tools to build and test your regular expressions

Regex BuilderPattern Library