If robots.txt tells search engine crawlers what they can access, llms.txt tells AI systems what your site is about and how to cite it.

It's a simple idea that's gaining traction fast — and in 2026, it's worth 15 minutes of your time.

What llms.txt actually is

llms.txt is a plain-text markdown file you place at your domain root (yoursite.com/llms.txt). It provides:

• A brief description of your site or product
• Links to your most important pages
• Optional detailed documentation (often in a companion llms-full.txt)

The format was proposed to help large language models understand websites without crawling every page. Think of it as a README for AI.

Here's a minimal example:

```

Acme Analytics

Team analytics dashboard for SaaS companies

Docs

• Getting Started: Setup guide
• Pricing: Plans and features

Optional

• Full product reference

```

That's it. No code, no plugins, no complex configuration.

llms.txt vs robots.txt

They serve different purposes:

| | robots.txt | llms.txt |

|---|-----------|----------|

| Audience | Search engine crawlers | AI/LLM systems |

| Purpose | Access control (allow/disallow) | Content description and citation guidance |

| Required? | Recommended | Optional (emerging standard) |

| Format | Plain text directives | Markdown |

You should have both. robots.txt controls crawling. llms.txt helps AI understand what it finds.

Do you actually need one?

Short answer: not yet required, increasingly recommended.

Here's who benefits most:

• SaaS products — AI assistants recommend tools when users ask "what's the best X for Y." llms.txt helps them describe your product accurately
• Content-heavy sites — blogs, docs, knowledge bases where AI might cite specific pages
• B2B companies — where buyers research via ChatGPT before visiting your site

Here's who can wait:

• Single-page sites with minimal content
• Sites that don't care about AI search visibility yet
• E-commerce (standards still evolving for product catalogs)

If you're reading an SEO blog in 2026, you're probably in the first group.

How to create one

Manual approach

1. Create a text file named llms.txt
2. Add your site name, one-line description, and links to key pages
3. Upload to your domain root
4. Optionally create llms-full.txt with detailed product/docs reference
5. Verify at yoursite.com/llms.txt

Automated approach

[Insight Engine generates llms.txt](/features/llms-txt-generator) from your connected site data — analyzing your pages, products, and content to produce an accurate file you can deploy in minutes.

We also maintain our own [llms.txt](/llms.txt) and [llms-full.txt](/llms-full.txt) as a reference for what good looks like.

Best practices

• Keep it concise — llms.txt should be scannable in 30 seconds
• Link to your best pages — pricing, docs, key product pages, top blog posts
• Update when your site changes — new features, pricing changes, major content
• Use llms-full.txt for depth — detailed reference material belongs in the companion file, not the main one
• Don't keyword stuff — write for AI comprehension, not SEO manipulation

The bottom line

llms.txt won't replace good content or traditional SEO. But as AI search grows, giving AI systems a clear map of your site is cheap insurance against being misunderstood or skipped entirely.

Create one this week. It takes 15 minutes and costs nothing.