Relative URL is a WordPress plugin designed to convert absolute URLs to relative ones, enhancing the ease of local development. This tool utilizes the wp_make_link_relative function, making it particularly useful for developers working on mobile devices. It allows seamless access to local instances of WordPress sites by simplifying links, which can resolve issues with styles and navigation when viewed on devices like iPads and iPhones.

This plugin is intended for local development environments only, and while it may function adequately, it is not recommended for production use. Users should be aware of potential issues, such as unwanted URLs appearing in RSS feeds or sharing links being converted to relative URLs. Overall, Relative URL aids in creating a smoother workflow for developers testing their sites in a mobile context.