Regex101
UnclaimedBuild, test, and debug regular expressions with real-time explanations and code generation.
Visit WebsiteTL;DR - Regex101
- Interactive regex builder and tester with real-time feedback.
- Supports multiple regex flavors and generates code for various languages.
- Includes debugging, benchmarking, and detailed explanations of regex patterns.
Pricing: Free forever
Best for: Individuals & startups
Pricing
Free
Regex101 is completely free to use with no hidden costs.
About Regex101
Regex101 is an online tool designed to help developers and anyone working with text patterns to create, test, and debug regular expressions. It provides a highly interactive environment where users can input their regex and test strings, receiving instant feedback on matches, substitutions, and a detailed explanation of how the regex works. This real-time analysis helps users understand complex patterns and identify errors quickly.
The platform supports various regex flavors, including PCRE2, PCRE, ECMAScript, Python, Golang, Java, and .NET, making it versatile for different programming environments. Beyond basic testing, it offers advanced features like a code generator to export regex into different languages, a debugger to step through regex execution, and a benchmark tool to evaluate performance. It's ideal for developers, data scientists, and anyone needing to master or efficiently use regular expressions.
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Regex101 FAQ
Regex101 is an online interactive tool for building, testing, and debugging regular expressions. It provides real-time feedback, explanations, and various utilities to help users work with regex patterns across different programming languages.
Regex101 is completely free to use.
Yes, Regex101 is a free online tool.
Regex101 is for developers, programmers, data scientists, and anyone who needs to create, test, understand, or debug regular expressions for text processing, data validation, or pattern matching in various programming contexts.