a11y-overlay is a free Chrome add-on designed to improve web accessibility by allowing users to inspect various elements of a webpage. This tool enables users to visualize important aspects such as landmarks, headings, focus order, and layout structure. By injecting the overlay into any tab, users can easily identify how accessible a webpage is, making it an invaluable resource for developers and accessibility advocates alike.

With a11y-overlay, users can gain insights into the organization of web content. It highlights key areas that may require attention for better usability by visually representing the structural components of a webpage. This functionality helps ensure that websites meet accessibility standards, allowing for a more inclusive online experience for all users.