HTML5 Outliner is a free Chrome extension developed by Dominykas Blyžė. As an add-on in the Browsers category, it falls under the subcategory of Add-ons & Tools. This extension generates a navigable page outline using the HTML5 outline algorithm.

With HTML5 Outliner, users can easily create a table of contents for web pages. It not only works well with HTML5 pages but also supports HTML4 and older pages that have structured headings. The generated table of contents is clickable, allowing users to jump to specific headings or sections of the page.

This extension is particularly useful for individuals who frequently use online HTML5 outliners. It simplifies the process of navigating through web pages and provides a convenient way to access specific sections of the content.

HTML5 Outliner is a valuable tool for web developers, designers, and anyone who needs to quickly navigate and understand the structure of web pages.