# Learn, Build, & Test RegEx

> RegExr is an online tool to learn, build, & test Regular Expressions (RegEx / RegExp).

- **Category:** Tools
- **Kind:** Tool
- **Host:** regexr.com
- **Destination:** https://regexr.com/
- **Date added:** 2019

This page is part of [Ref Point](https://ref-p.com/index.md), Chris Beltran’s curated library.