Regex Editor & Tester

This regex extracts the value of the utm_content UTM tracking parameter from a URL string. It uses a positive lookbehind to start matching right after 'utm_content=' and lazily captures all characters up to the next ampersand (start of another query parameter), whitespace, or end of line. It stores the result in a named capture group 'utm_content' for easy programmatic access, commonly used in marketing analytics and campaign attribution tracking.