Regex Checker is a free Chrome extension developed by itzkovitza that offers a powerful way to analyze webpages using regular expressions. As an add-on tool in the Browsers category, Regex Checker provides users with the ability to find important elements on webpages and highlight them.

With Regex Checker, users have two modes of operation: automatic and manual. In automatic mode, the extension utilizes a list of default regular expressions to parse the page and highlight important elements. Users also have the flexibility to add or remove expressions from the current search criteria, allowing for customizability.

For more advanced users, the manual mode of Regex Checker allows them to enter a custom regular expression along with flags. This feature provides a more tailored approach to webpage analysis, empowering users to extract specific information based on their needs.

Whether you're a web developer, data analyst, or simply curious about the structure of a webpage, Regex Checker is a valuable tool that brings the power of regular expressions to your Chrome browser.