Regex101Master regular expressions with a powerful online tester, generator, and validator.

Regex101 is a free online tool for testing and generating regular expressions with syntax highlighting, explanation, and cheat sheets for popular languages. Easily validate your regex patterns, visualize matches, and enhance your understanding of this powerful tool.

Regex Testing

Syntax Highlighting

Chrome Extension

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Regex101

Regex101 is a simple yet powerful regular expression tester with syntax highlighting, explanation, cheat sheet for PHP/PCRE, Python, Go, JavaScript, Java. Regex101 helps you easily test and generate regular expression patterns.

Product Highlights

Quick Testing: Easily test your regular expressions and see instant results.
Regex Generator: Craft regex patterns with ease for any task.
Regex Cheat Sheet: Explore and review common regular expressions.