Do you need both llms.txt and llms-full.txt?

No. Many sites ship only llms.txt. Add llms-full.txt when you have a clear reason to expose longer static text and a process to update it after each deploy.

Which file should I publish first?

Publish llms.txt after robots.txt and CDN rules allow AI bots. Add llms-full.txt later only if the short map is not enough for your documentation-heavy site.

Does llms-full.txt guarantee better AI citations?

No. A longer file does not guarantee ChatGPT, Perplexity, or Google AI Overviews will cite you. Crawl access, relevance, and platform policies still dominate outcomes.

AI search fix

llms.txt vs llms-full.txt: which file do you need?

The llmstxt.org proposal describes two optional root-level files. llms.txt is a short markdown map: title, summary, links to priority pages. llms-full.txt can carry longer excerpts for the same URLs. Most small business sites need only llms.txt. Neither replaces robots.txt, crawl access, or strong HTML. Google does not require either file for AI Overviews when crawlability and helpful content are already solid.

Choose llms-full.txt when you have stable long-form docs worth exposing to AI-oriented readers without every HTML click — and a process to update the file when those docs change. If upkeep is a concern, stick with lean llms.txt linking to canonical HTML. Allow trusted AI crawlers before investing in either file.

File	Typical use
llms.txt	Short site map: H1, summary, and markdown links to key public URLs.
llms-full.txt	Longer text or expanded sections for the same priorities — more maintenance.
Neither	Valid when crawl, schema, and page copy are fixed first — especially for Google Search.

You'll get an HTML report showing whether /llms.txt exists and whether AI crawlers are blocked beforehand.

Run the diagnostic

Updated 2026-05-28

llms.txt vs llms-full.txt: which file do you need?

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