Regular expression tester with syntax highlighting, explanation, cheat sheet for PHP/PCRE, Python, GO, JavaScript, Java, C#/.NET, Rust.

Menu RegExr is an online tool to learn, build, & test Regular Expressions (RegEx / RegExp). Supports JavaScript & PHP/PCRE RegEx. Results update in real-time as you type. Roll over a match or …

Regular Expression Tester with highlighting for Javascript and PCRE. Quickly test and debug your regex.

Test and generate regular expressions in real-time. Free online regex tool for developers with syntax highlighting, pre-built examples, and instant match results. No installation required.

This free online tool allows you to test, debug, and visualize your regular expressions in real-time. As you type your regex pattern and test string, the matches will be highlighted instantly.

Test and debug your regular expressions online in real-time. Our free regex tool highlights matches, shows capture groups, and includes a library of common patterns and a handy cheatsheet.

Test regular expressions with real-time matching, highlighting, pattern explanation, and common regex library. 100% client-side JavaScript engine.

Free online regex tester to test and validate regular expressions with real-time matching. Build, debug, and generate regex patterns instantly. JavaScript regex syntax supported.

Test your regex by visualizing it with a live editor. JavaScript, Python, and PCRE.

Free online regex tester and visualizer. Test regular expressions with sample text, see real-time matches, and visualize regex patterns as diagrams. Supports JavaScript, Python, and more.