Semantic Navigator is a Chrome add-on designed for developers, QA engineers, and accessibility consultants to interact with web pages through their semantic tree structure. This tool replaces traditional visual rendering, allowing users to explore the Document Object Model (DOM) and the accessibility tree in a side panel, facilitating a deeper understanding of how assistive technologies navigate web content. Users can click, navigate, focus, and submit elements without needing a mouse, providing a streamlined experience for auditing web accessibility.

Key features include live highlighting of the page's focus as users tab through elements, the ability to scope down to specific dialogs or forms, and filtering by roles such as links, buttons, and headings. Users can inspect tab orders to identify focus issues and utilize the 'curtain' feature to audit the page strictly through the semantic tree. Built on the open-source Real A11y engine, Semantic Navigator ensures that all operations occur locally, maintaining user privacy.