RegExr
regexr.comLearn, Build, & Test Regular Expressions online
Dev Toolsregexdeveloper-tooljavascriptphppcretestingopen-source
About
RegExr is a web-based tool for writing, testing, and learning regular expressions. It supports JavaScript and PHP/PCRE regex engines with real-time match highlighting, a full reference cheat sheet, and contextual help. Users can save and share expressions and browse a searchable library of community-contributed patterns.
Problem
Writing and debugging regular expressions is difficult without immediate visual feedback and reference material.
For
software developers and anyone learning or working with regular expressions
How it works
Users type a regex and test string into an online editor that highlights matches in real time, with contextual explanations, a cheat sheet, and community patterns available alongside.
Business model
free
Status
launched