RegexPal is described as 'An online JavaScript regular expression tester. Enter a regex expression and test data and determine if matches are made' and is an website in the development category. There are more than 25 alternatives to RegexPal, not only websites but also apps for a variety of platforms, including Windows, Mac, Linux and Self-Hosted apps. The best RegexPal alternative is RegExr, which is both free and Open Source. Other great sites and apps similar to RegexPal are regular expressions 101, Expresso, RegexMate and Wildcard.