What Is llms.txt and Do You Need It?
The short answer
llms.txt is a markdown file at your site root that gives AI tools a clean, curated summary of your most important content and links. It helps engines ingest your site efficiently without wading through navigation and boilerplate. It's optional and not yet universally used, but it's low-effort and a positive AEO signal.
What is llms.txt?
llms.txt is a proposed standard: a markdown file at yoursite.com/llms.txt that lists your key pages with short descriptions, so AI tools can find and ingest your most useful content quickly. Think of it as a curated, AI-friendly table of contents.
Is llms.txt the same as robots.txt?
No. robots.txt controls which crawlers may access which paths. llms.txt does the opposite job — it highlights and describes the content you want AI tools to use. One gatekeeps; the other guides.
Do I actually need it?
It's optional and adoption is still growing, so don't expect dramatic results. But it's quick to add, signals AEO maturity, and can't hurt. Pair it with an llms-full.txt that contains your full reference content for one-request ingestion.
How do I create one?
- ▪Add /llms.txt with an H1 (your brand), a one-paragraph summary, and sections of described links.
- ▪Keep it concise and within a reasonable token budget.
- ▪Optionally add /llms-full.txt with full content for deep ingestion.
- ▪Verify it's discoverable and well-formed with an AEO scanner.
Frequently asked questions
+Does llms.txt improve my AI visibility?
It's a helpful, low-cost signal rather than a guaranteed boost. It makes your key content easier for AI tools to find and ingest, but crawler access, extractable content, and entity trust matter far more for actually getting cited.
+Where does llms.txt go?
At the root of your domain: yoursite.com/llms.txt, served as plain markdown. An optional llms-full.txt at the root holds your full reference content in one file.
+Do all AI engines read llms.txt?
Not yet — it's an emerging convention with partial adoption. Add it for the upside and AEO signal, but don't rely on it as your main visibility lever.