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

RegEx Tester is described as 'This script allows for the testing of regular expressions for both RegExMatch() and RegExReplace(). The results update in real time and any setting or expression errors are highlighted in red' and is an app. There are four alternatives to RegEx Tester for Web-based, Self-Hosted, Google Chrome, Flathub and Linux. The best RegEx Tester alternative is RegExr, which is both free and Open Source. Other great apps like RegEx Tester 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.
