Change Author Link Structure is a free WordPress plugin designed to enhance the privacy of user information by altering how author permalinks are structured. This plugin replaces the author's username in the permalink with their unique author ID, effectively preventing usernames from being publicly displayed. If the default permalink structure is used, users will encounter a 'Page not found' error, adding an additional layer of security against unauthorized access to user profiles.

In addition to modifying the permalink structure, Change Author Link Structure allows users to customize the author base, offering flexibility for those looking to further enhance their site's privacy features. This plugin is compatible with other plugins that also provide author base customization options, making it a versatile choice for WordPress users concerned about security and privacy.