Domains targeting keyword regex test

Rubular is a Ruby-based regular expression editor and tester. It's a handy way to test regular expressions as you write them. Rubular is an especially good fit for Ruby and Rails developers, since it uses Ruby on the server to evaluate regexes, but should also be useful for those working in other programming languages and frameworks (Java, PHP, Python, Javascript, etc.)

Test your regex by visualizing it with a live editor. JavaScript, Python, and PCRE.

Test your Javascript and PCRE regular expressions online.

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

This site allows you to check the operation of the regular expression for Java. Regular expression string specified by the TEST button is tested, I can confirm the result

Regular expression tester with syntax highlighting, contextual help, video tutorial, reference, and searchable community patterns.

Regular Expression Tester with highlighting for Javascript and PCRE. Quickly test and debug your regex.

Reggy is a small OS X cocoa/objective-c application to very quickly visualize what a given regular expression will match given a test string. It will also tell you if you have errors in your regular expression.

RegViz is a tool for debugging JavaScript regular expressions in a visual way. Advanced highlighting helps you to understand the structure and purpose of a regular expression and to detect bugs therein. You can test the regular expression on a sample text and formulate test cases. We tried to come up with a very user friendly tool.

Regular Expression Library provides a searchable database of regular expressions. Users can add, edit, rate, and test regular expressions.