URL Monster is a free Chrome add-on designed to simplify the editing and management of URLs. This tool allows users to view the various components of a URL, including the scheme, host, port, path, queries, and fragment, each displayed as separate elements. Users can create, edit, delete, decode, and encode these components, making it easier to manipulate URLs for various purposes.

Additionally, URL Monster enables users to rebuild the full URL from the modified components and apply it to either the current tab or a new tab. The tool has undergone several updates, including a significant remake with Vue.js in version 2.0.0, and it continues to enhance user experience with fixes and improvements in subsequent versions.