A free environment for regular expression testing (ferret). It allows you to write regexes and test them against a sample text, providing extensive output about the results.
Cost / License
- Free
- Open Source
Platforms
- Linux

RegExr is described as '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' and is a popular regular expression editor in the development category. There are more than 25 alternatives to RegExr, not only websites but also apps for a variety of platforms, including Windows, Mac, Linux and Self-Hosted apps. The best RegExr alternative is regular expressions 101, which is free. Other great sites and apps similar to RegExr are Regex Forge, Expresso, RegexBuddy and RegexMate.
A free environment for regular expression testing (ferret). It allows you to write regexes and test them against a sample text, providing extensive output about the results.

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.

Create, edit, and test RegEx Regular Expressions. Replace, format, and extract text in files using Regular Expressions. Perform GREP-like tasks, use RegEx substitutions, extract data! Supports color syntax highlighting and contextual tooltips making it easy to design patterns.




Search multiple strings occurrences simultaneously with the help of this piece of software that comes with support for regular expressions.


DevUtilHub provides 24+ free online developer tools including regex tester, Base64 encoder/decoder, JWT debugger, JSON formatter, hash generators, and more. All tools run entirely in your browser for maximum privacy and speed. No signup required.

If you’re annoyed by regex’s syntax and simply don’t like the notation, or your specific regex library is awfully slow, there are alternatives. Regex is hard to read, even one’s own expressions after some time.
Multi String Replacer is a small and portable application that can be used to replace multiple strings at once. Its main functionality is String Swapping in which can be easily and quickly done. String swapping consists on replacing WordX with WordY and WordY with WordX.

