llms.txt vs. llms-full.txt: Which AI Website File Do You Need?

llms.txt and llms-full.txt are complementary files. One is a concise, curated index. The other is a larger knowledge file that contains readable content from selected pages. Choosing the right format depends on whether an AI system needs directions, source material, or both.

Choose llms.txt when discovery matters

An llms.txt file is compact. It introduces your site, groups high-value links, and gives each page a short description. That makes it a useful entry point for models and agents that need to understand your website structure before deciding which pages to retrieve.

Use the llms.txt generator when your primary task is to create a clean index from a sitemap, homepage, or chosen set of URLs. Keep the file focused and review every description before publishing.

Choose llms-full.txt when content must travel together

An llms-full.txt file gathers the readable content of selected pages into one document. It is useful for retrieval systems, internal AI tools, and workflows where you want to provide source content without asking a model to crawl every linked page.

The llms-full.txt generator is the right starting point when your priority is complete context. It can collect useful sections while leaving repeated navigation and page chrome behind.

Use both files for different jobs

You do not need to choose one format forever. Many sites benefit from both:

• llms.txt supplies the map and the editorial priorities.
• llms-full.txt supplies deeper material for pages that need to be read together.
• Your validator helps keep the compact index structurally sound as the site changes.

Keep the source material current

Neither file should be a one-time export. Review them when you ship major documentation, change product positioning, retire URLs, or publish a new knowledge base. If a page no longer represents your current product, remove it from both the index and full-content workflow.

The practical test is simple: would this file help a capable new teammate explain your website accurately? If the answer is yes, it is likely also helping an AI system start with better context.