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Is there any good regex webapps out there?

I'd like to be able to set which type of regex syntax is used, enter some text and a regex and get matches highlighted. Preferably with different colors so it's easy to detect what in the regex is causing the match.

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+1 - This question has brought out some nice regex options. –  slugster Jul 8 '10 at 10:24

6 Answers 6

up vote 15 down vote accepted
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this answer makes me smile. +1 –  Justin L. Jul 8 '10 at 9:49
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+1 for Rubular, it's a great tool. –  Simone Carletti Jul 8 '10 at 9:51
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+1 for regexpal - using it for more than 6 years or so... –  mbrochh Jul 8 '10 at 10:11
    
its hard to see for which of your given options people are now voting ... –  akira Jul 8 '10 at 10:29
    
strfriend.com is no more –  Eric Jun 9 '12 at 12:40

http://www.debuggex.com/
Includes visualizer for the pipes and colored visualizer for the test text matches.

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reAnimator is a great regular expression visualizer. It helped me optimize some tricky regexes.

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Great Tool, thanks! –  Aaron Jul 9 '10 at 8:44

I've always used regexlib.com (here is their testing page, they even have a silverlight engine in there which is quite cool). They also have a great library of regexes that people have submitted.

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http://gskinner.com/RegExr is good.

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I use the RegexTester to do this, the site is pretty simple and does just what you ask.

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