LinkFBI Blacklist Checker is a free Chrome extension designed for SEO professionals and website owners. This tool checks the subdomain of the current page URL against a comprehensive blacklist maintained by an SEO consultant. If the subdomain is found on the blacklist, the extension provides an informative popup explaining the reasons for the disavowal, helping users make informed decisions regarding their website's integrity.

By simplifying the process of checking URLs, LinkFBI Blacklist Checker enhances the workflow for users who need to quickly identify potentially harmful subdomains. The functionality is also available through a web interface, but the extension offers a more convenient and efficient way to access this vital information directly from the browser.