Regex101 is a powerful, online regular expression tool with extensive support for multiple languages including PHP, PCRE, Python and JavaScript.
Cost / License
- Free
- Proprietary
Platforms
- Online

Pyrexp is described as 'Regex testing tool that allows to validate regex patterns, test regular expressions against strings, and also includes a regex visualizer that provides graphical visualization of regex patterns' and is an website in the development category. There are seven alternatives to Pyrexp, not only websites but also apps for a variety of platforms, including Android, Self-Hosted, Flathub and Flatpak apps. The best Pyrexp alternative is regular expressions 101, which is free. Other great sites and apps similar to Pyrexp are Regulex, Debuggex, NeoRegex and Pythex.
Regex101 is a powerful, online regular expression tool with extensive support for multiple languages including PHP, PCRE, Python and JavaScript.


Pythex is a real-time regular expression editor for Python, a quick way to test your 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.
