Testers

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Regular Expression Library

http://regexlib.com/default.aspx Welcome to RegExLib.com , the Internet's first Regular Expression Library. Currently we have indexed 3378 expressions from 1978 contributors around the world. We hope you'll find this site useful and come back whenever you need help writing an expression, you're looking for an expression for a particular task, or are ready to contribute new expressions you’ve just figured out. Thanks! Oracle Regular Expressions Pocket Reference

Toolbox - Regular Expression Tester with examples

Replaces any "gray" or "grey" with "GRay". First, \b is used to prevent replacement of "gray" within the word "stingray". Having no \b at the end allows replacement of "gray" in "grayish". Next, [ae] allows for alternate spellings. Finally, i and g specify a case-insensitive and global search and replace. /\b(cat|dog)\b/ig,"pet" http://www.design215.com/toolbox/regexp.php

reWork: a regular expression workbench

This is a graph of the FSA that corresponds to this regular expression. This won't help you use regular expressions; it's just to test my graph presentation library, and for fun. If you're interested in this sort of thing, see my reAnimator tool. http://osteele.com/tools/rework/

JavaScript RegExp Example: Online Regular Expression Tester

Did this website just save you a trip to the bookstore? Please make a donation to support this site, and you'll get a lifetime of advertisement-free access to this site! http://www.regular-expressions.info/javascriptexample.html

***Regex Powertoy (interactive regular expressions)

Enter a regular expression in the top text area; double-click in the bottom area to enter the target input to match. As soon as you tab, [esc], or click out of the bottom area, matching will begin. You can choose between Perl/PHP-like or Java regular expression syntax, and whether the target text is highlighted to show matches, edits, replacements, or splits. The animate option lets you watch the regex engine at work. Creating a matchmark sends your browser to a bookmarkable URI that will reproduce the current regex pattern, settings, and target text. Clicking a match gives more info, including how the capturing groups matched. http://regex.powertoy.org/
Regular Expression Tester Anytime I use regular expressions (aka "regex"), I find myself doing a bit of trial-and-error until I get the right pattern. So, I whipped up this simple utility to help.

Regular Expression Online Tester

http://www.quanetic.com/Regex
http://www.sweeting.org/mark/html/revalid.php

Regular Expression Validator // sweeting.org

For characters that are usually treated literally, indicates that the next character is special and not to be interpreted literally. For example, /b/ matches the character 'b'. By placing a backslash in front of b, that is by using /\b/ , the character becomes special to mean match a word boundary. For example, * is a special character that means 0 or more occurrences of the preceding character should be matched; for example, /a*/ means match 0 or more a's . To match * literally, precede the it with a backslash; for example, /a\*/ matches 'a*'.