Google pushes back on markdown-only pages for AI SEO

Google is pushing back on a neat but dangerous AI SEO shortcut: turning full websites into markdown-only pages and calling that better for large language models. In a Search Off the Record episode released on June 15, 2026, John Mueller and Martin Splitt took aim at the idea that less HTML automatically means more visibility, especially around whether publishers should convert sites to Markdown and whether llms.txt is worth the effort for SEO.

Their case was simple and, for anyone who has watched search systems evolve, familiar. HTML is not just a wrapper around visible text. It carries structure, crawlable links, accessibility cues, and other signals that help browsers, search engines, and AI systems understand what a page is and how its parts fit together. Strip a page down to only the text a human might skim, and you may also strip away the context that tells machines whether a headline is a section label, a link is a real path to another page, or a block of text is supporting detail rather than the main point.

That lines up with Google’s own documentation. Google says structured data helps it understand page content and can influence richer search features. It also says links are a signal for relevancy and discovery, and that crawlable links are generally parsed from HTML a elements with href attributes. Search Essentials goes further, telling site owners to create helpful, reliable, people-first content and to place words people would search for in prominent spots such as titles, main headings, alt text, and link text.

The accessibility angle matters just as much as the ranking angle. Google’s guidance says headings help readers understand a document, and informative link text improves SEO as well. The company also points to the World Health Organization’s estimate that about 15% of the world’s population has an accessibility need, which is exactly why flattening a page into a plain-text artifact can be a downgrade, not an upgrade.

The larger lesson for brands chasing AI visibility is that the race is not to remove the web’s structure. It is to make that structure cleaner, clearer, and easier to parse. Search Engine Land made a similar point in January 2026, arguing that standard SEO fundamentals still drive AI citations and that pages built only for machines are not the answer. Google’s message in this episode was sharper than a trend piece and more practical than the markdown hype: keep the HTML that carries meaning, or risk making the page harder to understand for everyone that matters.