Regular expressions have been part of the programmer’s toolkit for a long time, with their creation by Stephen Cole King in 1951. Their ability to match word patterns make them a powerful tool for ...

A regular expression tester that runs entirely in your browser. Type a pattern and see every match and capture group highlighted in your text, preview replace and split, and read what each part of the ...

Regex Tutorial: Matching an Email Validating an email is a common task in a web world with so many submission forms. The regular expression, or regex, for matching an email is a simple and structured ...