RegExr.com is an online tool to learn, build, and test Regular Expressions. It was created by Grant Skinner and the nice people at gskinner.com.
Cost / License
- Free
- Open Source (GPL-3.0)
Platforms
- Online

ReX.js is described as 'Create regexps with clean, readable, functional & chainable syntax with help of in-editor autocompletion from TypeScript! Built better regexps faster!' and is an app in the development category. There are four alternatives to ReX.js for Web-based, Self-Hosted, Google Chrome, Flathub and Linux. The best ReX.js alternative is RegExr, which is both free and Open Source. Other great apps like ReX.js are Wildcard, iHateRegex and Regex101 Chrome Extension.
RegExr.com is an online tool to learn, build, and test Regular Expressions. It was created by Grant Skinner and the nice people at gskinner.com.



iHateRegex offers an easy way for developers to find helpful and reusable regular expressions while also providing an intuitive playground to interact with regex snippets to create or just learn.


Regular expression tester with syntax highlighting, explanation, cheat sheet for PHP/PCRE, Python, Go, JavaScript, Java.
