regex101
Build, test, and debug regular expressions with ease
regex101 is an online regular expression tester and debugger supporting multiple flavors including PHP/PCRE, Python, Go, JavaScript, Java, C#/.NET, and Rust. It provides syntax highlighting, real-time match explanations, a reference cheat sheet, and tools for building and validating regex patterns. The platform also offers a commercial regex parser, enterprise self-hosting, and a Pro benchmarking workflow.
Users enter a regex pattern and test string in the browser-based editor, which provides real-time syntax highlighting, match details, and an auto-generated explanation of the pattern.
software developers
Background.
- Status
- launched
- Business model
- freemium
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