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

RegExr vs Debuggex Comments
Debuggex's best feature was the visualiser. I can't find another site that has exactly that, but the RegExr explainer at the bottom of the page is a good alternative. Plus, the interface is clean, the cheatsheet is handy, and the 'Community Patterns' are helpful.


- RegExr is Free and Open Source


























































It seems that Debuggex will be unavailable after November 30th. This shows on login attempt on debuggex.com.