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Regex Editor & Tester

Build, test, and debug regular expressions

About Regex Editor & Tester

A powerful, free online tool for building, testing, and debugging regular expressions with real-time feedback and comprehensive learning resources.

Real-time Testing

Test your regular expressions instantly with live match highlighting and detailed group information.

Advanced Features

Support for all regex flags, replacement testing, and comprehensive pattern debugging tools.

Learning Resources

Extensive quick reference guide with examples and sample patterns to help you master regex.

Free & Open

Completely free to use with no registration required. Built for developers, by developers.

Why Use Our Regex Editor?

Regular expressions are powerful tools for pattern matching and text processing, but they can be complex and error-prone. Our regex editor provides a user-friendly interface that makes it easy to:

  • Build and test regex patterns with immediate visual feedback
  • Debug complex expressions with detailed match information
  • Learn regex syntax through interactive examples and references
  • Test replacement patterns before implementing them in code
  • Work with different regex flavors and flags

Whether you're a beginner learning regex basics or an experienced developer working with complex patterns, our tool provides the features and resources you need to work efficiently with regular expressions.

For questions or support, please contact us. By using this tool, you agree to our terms of service and privacy policy.