How can test I regular expressions using multiple RE engines? [closed]

The most powerful free online regexp testing tool is by far http://regex101.com/ – lets you select the RE engine (PCRE, JavaScript, Python), has a debugger, colorizes the matches, explains the regexp on the fly, can create permalinks to the regex playground.

Other online tools:

  • http://www.rexv.org/ – supports PHP and Perl PCRE, Posix, Python, JavaScript, and Node.js
  • http://refiddle.com/ – Inspired by jsfiddle, but for regular expressions. Supports JavaScript, Ruby and .NET expressions.
  • http://regexpal.com/ – powered by the XRegExp JavaScript library
  • http://www.rubular.com/ – Ruby-based
  • Perl Regex Tutor – uses PCRE

Windows desktop tools:

  • The Regex Coach – free Windows application
  • RegexBuddy recommended by most, costs US$ 39.95

Jeff Atwood [wrote about regular expressions]( post:).

Other tools recommended by SO users include:

  • http://www.txt2re.com/ Online free tool to generate regular expressions for multiple language (@palmsey another thread)
  • The Added Bytes Regular Expressions Cheat Sheet (@GateKiller another thread)
  • http://regexhero.net/ – The Online .NET Regular Expression Tester. Not free.

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