What is LLMs-full.txt?
LLMs-full.txt is an expanded, comprehensive version of the standard LLMs.txt file. While LLMs.txt provides a structured summary and map of your site, LLMs-full.txt can contain the full Markdown content of your most important pages — making deeper content directly available to AI systems that support it.
LLMs.txt is an emerging convention, not a confirmed standard or ranking factor. LLMs-full.txt follows the same convention as an optional expanded companion file.
Like LLMs.txt, it is placed at the root of your site:
https://yourdomain.com/llms-full.txt
LLMs.txt vs LLMs-full.txt
| Aspect | LLMs.txt | LLMs-full.txt |
|---|---|---|
| Purpose | Site summary and map | Full expanded content |
| Content | Headings, links, short descriptions | Full page content in Markdown |
| Size | Typically a few KB | Can be several MB |
| Best for | Most websites | Docs, APIs, knowledge bases |
When LLMs-full.txt makes sense
LLMs-full.txt is most useful for:
- Documentation sites — making full technical documentation directly available to AI systems.
- API docs — providing complete API reference content for AI-assisted development.
- Developer tools — giving AI models access to usage guides and SDK documentation.
- SaaS knowledge bases — helping AI systems answer support questions with full context.
- Open-source projects — including README, contributing guides, and changelogs.
- Technical content libraries — deep educational or reference content.
When it may be too large or unnecessary
If your full content exceeds several megabytes, the file may be ignored or truncated by AI systems. Very large files also increase bandwidth costs and may slow down AI crawler processing.
For most websites — marketing sites, e-commerce stores, personal blogs, simple SaaS landing pages — the standard LLMs.txt is sufficient. LLMs-full.txt is an advanced option for content-heavy, documentation-oriented sites.
Examples of good use cases
- A documentation platform that wants AI tools to have access to its full API reference.
- An open-source library providing complete README, contributing guide, and changelog in one AI-readable file.
- A SaaS knowledge base making its support articles directly available for AI-assisted customer support.
How to check whether your site has one
Use our free LLMs.txt Checker. Enter your website URL and it will check for both LLMs.txt and LLMs-full.txt, along with sitemap, robots.txt, and AI crawler access — all in a single technical report.