RegexBuddy

RegexBuddy is your perfect companion for working with regular expressions. Learning, creating, understanding, testing, using and saving regular expressions has never been easier.

Commercial Windows

RegExr

RegExr is an online tool for editing and testing Regular Expressions (RegExp / RegEx). It provides a simple interface to enter RegEx expressions, and visualize matches in real-time editable source text.

Free Open Source Web

RegexPal

An online JavaScript regular expression tester. Enter a regex expression and test data and determine if matches are made.

Free Web

Debuggex

debuggex is an intuitive visual regular expression debugger, tester, and helper. note: login/registration relies on persona which is now shut down.

Freemium Web