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Regex validation. Test PHP, Perl or Javascript regular expression - instant live AJAX online testing tool (regex validator). Search and replace with RegExp.

Myregextester.com is an online regular expressions tester that allows visitors to construct, test, and optimize regular expressions.

Online Silverlight regular expression tester with instantaneous highlighting, C# and VB.NET code generation, code completion, regex analysis, benchmarking, and more.

Online regex tester, debugger and replacement tool with real time explanation, error detection and highlighting for PHP, PCRE, Python and JavaScript. Come and check out the free educational regex quiz!

A visual regex helper

At Regular-Expressions.info you will find a wide range of in-depth information about a powerful search pattern language called regular expressions.

Rubular is a Ruby-based regular expression editor and tester. It

SourceForge.net. Fast, secure and free downloads from the largest Open Source applications and software directory

Online tools for developers, including formatters (JSON, XML, HTML, SQL, etc.), minifiers (JavaScript, CSS), validators, compactors and many more!

SEO Tools and Articles, including the AWStats Library, the Web Robots Encyclopedia, a ReGex Tester and a Redirect Checker that checks a redirect in seconds, even if you are not a HTTP-header guru !