gskinner/regexr

RegExr is a HTML/JS based tool for creating, testing, and learning about Regular Expressions.

JavaScript

10,374

393 commits

updated Jul 17, 2025

See the code

README

RegExr

About

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.

Features

  • Results update in real-time as you type.
  • Supports JavaScript & PHP/PCRE RegEx.
  • Roll over a match or expression for details.
  • Save & share expressions with others.
  • Use Tools to explore your results.
  • Browse the Reference for help & examples.
  • Undo & Redo with cmd-Z / Y in editors.
  • Search for & rate Community patterns.

Issues & Feature Requests

Please report issues & feature requests on GitHub. Please do not post questions about regular expressions (use Stack Overflow instead).

Contributing

If you would like to contribute back to RegExr.com please send us pull requests.

Please make sure they are well formatted and follow the style specified out in the existing files.

License

This version of RegExr is licensed under GPL v3. If you're interested in using the source under other terms, feel free to get in touch.

Build

RegExr uses Gulp to manage the build process. You will need to install Node and Gulp, and install other dependencies via npm install. Running gulp (default) will run dev builds and set up a test server.

gskinner/regexr

RegExr is a HTML/JS based tool for creating, testing, and learning about Regular Expressions.

JavaScript

10,374

393 commits

updated Jul 17, 2025

See the code

README

RegExr

About

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.

Features

  • Results update in real-time as you type.
  • Supports JavaScript & PHP/PCRE RegEx.
  • Roll over a match or expression for details.
  • Save & share expressions with others.
  • Use Tools to explore your results.
  • Browse the Reference for help & examples.
  • Undo & Redo with cmd-Z / Y in editors.
  • Search for & rate Community patterns.

Issues & Feature Requests

Please report issues & feature requests on GitHub. Please do not post questions about regular expressions (use Stack Overflow instead).

Contributing

If you would like to contribute back to RegExr.com please send us pull requests.

Please make sure they are well formatted and follow the style specified out in the existing files.

License

This version of RegExr is licensed under GPL v3. If you're interested in using the source under other terms, feel free to get in touch.

Build

RegExr uses Gulp to manage the build process. You will need to install Node and Gulp, and install other dependencies via npm install. Running gulp (default) will run dev builds and set up a test server.

Project health

Overall

2.0/10

Maintained

0/10

Code review

0/10
OpenSSF Scorecard

Significant stargazers

(top 24 of 90)

Mathias Bynens

13,084 followers · starred May 2024

fisker Cheung

557 followers · starred Jun 2021

Ng Zhi An

192 followers · starred Jan 2015

wolfy1339

130 followers · starred Dec 2018