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On the Mac I use at work, RegexRX is installed. Unfortunately, It only runs on OS X and I'm looking for a GNU/Linux alternative, preferably a FLOSS one.

The key functionality that I require is:

  1. Given a regex, show what text does/doesn't match the pattern
  2. Provide a way to export the pattern as a search pattern in a number of languages (mainly PHP and Python).

I've already looked at alternativeto.net and tried Regexp Testing Tool to no effect.

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I've found RegExr very easy to use; it's an online tool that lets you build a regular expression as well as how it matches a sample text.

RegExr screenshot

Pros:

  • Edit regex and see matches live
  • Online (runs anywhere with a browser)
  • FLOSS (MIT license)
  • Explains the meaning of various characters in the expression when cursor hovers over them
  • Includes a cheat sheet and reference for the occasion when you forget exactly what something does

Cons:

  • Export expression/pattern available but not specifically for Python/PHP (although I'm not sure how much that matters, given how trivial it is to write code once the pattern is given)
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  • Thanks. I'll put it through its paces and see what I can see. If I get the results I want, I'll accept your answer. – Agi Hammerthief Nov 4 '14 at 9:41
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I personally use the Google Chrome Regular Expression Checker tool from the Chrome Extensions.

It is free and a compliant regexp will work in both PHP and python by simple copy and paste.

enter image description here

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  • 2
    Thanks for the suggestion, but I can't seem to find it in Chrome's Web store. Could you please provide a link? – Agi Hammerthief Nov 3 '14 at 11:49

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