Regular expression tester with syntax highlighting

Online regex tester, debugger with highlighting for PHP, PCRE, Python, Golang and JavaScript.

Regular expression tester with syntax highlighting

Forum thread about Regex and which tools are available.

Goto start of series Once upon a time there was a beautiful Windows programmer named Red Ridinghood.One day, Red’s supervisor told her that they were going to start building a new application…

"Global Regular Expression Print is a staple of every command-line user’s toolbox. As with find, it derives a lot of power from being combined with other tools and can increase your productivity significantly."

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

Good information about regexp with reasonable examples. Lookahead, lookaround, nesting, capturing, assertions, etc.

"Tired of debugging your regular expressions ? Do you want to quickly build efficient regexps ? Visual REGEXP is for you ! This software will let you design your regexps by letting you type the expression and visualize its effect on a sample of your choice."

Regular Expression Reference: Special Groups

Regexp lecture guide by Cheetah.

RegExr is an online tool to learn, build, & test Regular Expressions (RegEx / RegExp).

"If you have a very large HTML SELECT list, finding the correct item can be like looking for a needle in a haystack. For example, if you have a list of a couple hundred names, finding a single one can be difficult. This article describes a JavaScript technique for filtering the items in a select list so that only the matching items are shown, making it much easier to locate the desired item."