# llms.txt Explained: The 5-Minute AI-Visibility Setup Every Business Should Do
The short version
llms.txt is a small plain-text file you put at the root of your website (like robots.txt) that tells AI models — Claude, Perplexity, ChatGPT with browsing, next-gen crawlers — what your site is, what it does, and which pages matter. It takes about five minutes to set up. Anthropic already consults it. Perplexity is rolling in support. OpenAI hasn't confirmed but the content ends up in higher-quality training crawls regardless. It's currently one of the highest-ROI, lowest-effort things you can ship for AI search visibility.
This guide covers what it is, why it works, and gives you a copy-paste template to ship one today.
Where llms.txt came from
The llms.txt standard was proposed in 2024 and drafted at <a href="https://llmstxt.org/" rel="noopener noreferrer" target="_blank">llmstxt.org</a> by a community that includes engineers at Anthropic and Perplexity, alongside people from Jina AI, Answer.AI, and several major crawler operators. The problem it solves is that AI models have to read your entire site to understand what you do — which is expensive, error-prone, and often misses the point. llms.txt gives them a curated, human-authored summary in Markdown that says: here's who I am, here's what I offer, here are the URLs you should look at.
Think of it as an XML sitemap plus a Table of Contents plus a brief homepage summary, all wrapped in a format LLMs are already excellent at reading.
What it looks like
The file lives at yourdomain.com/llms.txt. It's plain text formatted as Markdown. A minimum viable version:
# Nagro Solutions
> Nagro Solutions is a bilingual web development agency serving Saudi Arabia and US businesses from Jeddah and Seattle. We build websites, mobile apps, ecommerce, and AI-visibility programs.
## Services
- [Website Design & Development](https://nagrosolutions.com/services/website-design-development/): Custom, fast, bilingual websites and web apps.
- [Mobile App Development](https://nagrosolutions.com/services/mobile-app-development/): iOS + Android apps built with Flutter and React Native.
- [Ecommerce Development](https://nagrosolutions.com/services/ecommerce-development/): Shopify, custom, and headless commerce for Saudi and US brands.
- [AI Visibility Optimization](https://nagrosolutions.com/services/ai-visibility-optimization/): Get named by ChatGPT, Claude, and Perplexity when your customers ask.
## Free Tools
- [AI Visibility Check](https://nagrosolutions.com/tools/ai-visibility-check/): See how AI models describe your business.
- [llms.txt Generator](https://nagrosolutions.com/tools/llms-txt-generator/): Generate a starting llms.txt for your site.
- [Website Health Score](https://nagrosolutions.com/tools/website-health-score/): 60-second technical SEO audit.
- [Website Cost Calculator](https://nagrosolutions.com/tools/website-cost-calculator/): Ballpark your bilingual website cost.
## Comparisons
- [Astro vs Next.js](https://nagrosolutions.com/compare/astro-vs-nextjs/): Which framework fits which project.
- [Shopify vs Custom Ecommerce](https://nagrosolutions.com/compare/shopify-vs-custom-ecommerce/): When each is the right call.
- [OpenAI vs Anthropic](https://nagrosolutions.com/compare/openai-vs-anthropic/): Which LLM for which use case.
## About
- [About Us](https://nagrosolutions.com/about/)
- [Locations](https://nagrosolutions.com/locations/) — Jeddah, Seattle
- [Contact](https://nagrosolutions.com/contact/)That's the whole thing. Under 40 lines, human-readable, machine-parseable.
What makes it work
Three properties make llms.txt disproportionately effective:
- It's your own summary of your business. Every other AI-visibility signal (schema, backlinks, third-party mentions) is either a machine-readable claim or a third-party opinion.
llms.txtis the one place where you get to tell an AI model in plain language what you actually are. AI models weight self-descriptions less than external corroboration, but they weight coherent, machine-friendly self-descriptions much higher than they weight scraped homepage copy. - It's a discovery hint, not just a description. The URLs you list are effectively saying "these are the pages that matter." A model doing on-demand retrieval (Perplexity, Claude with search, Gemini AI Mode) uses this as a signal for which pages to fetch first.
- The Markdown format matches how LLMs already read. Sitemaps are XML, which is machine-friendly but semantically thin.
llms.txtis Markdown with headers, bullet lists, and short prose — which is exactly what LLMs are trained on.
What to include, in order of impact
# Business nameat the top.> One-sentence descriptionunderneath — this is what gets quoted verbatim when a model summarises you. Make it count.## Services— every service you offer, one line each, linked.## Toolsor## Free Resources— if you have free tools, list them.## Comparisons— link out to your compare pages. These get quoted heavily.## Case Studiesor## Portfolio— if you have client work you can name, list a few.## Locations— where you operate, especially if geography matters.## Contact— quick links to about, contact, phone, email.
Don't include everything on your site — that's what sitemap.xml is for. llms.txt is a curated summary, not a directory dump. Aim for 20-50 links total.
How to ship it in five minutes
- Copy the template above.
- Replace the business name, description, and service list with yours.
- Save as
llms.txt. - Upload to the root of your website at
yourdomain.com/llms.txt. - Confirm it loads by visiting the URL in a browser.
That's it. Nothing to register, nothing to submit. AI crawlers that support the standard will find it on their next visit.
If you'd rather have it generated from your existing site, we built a <a href="https://nagrosolutions.com/tools/llms-txt-generator/">free llms.txt Generator tool</a> that takes a URL and produces a starting file.
Common questions
Do I need this if I have a sitemap.xml? Yes. They do different things. sitemap.xml is a machine-parseable list of every URL — good for search-engine indexing. llms.txt is a human-authored summary of what your site is — good for LLM understanding. Ship both.
Does Google use it? Google hasn't officially confirmed. Anthropic (Claude) uses it, Perplexity is rolling in support, and even models that don't parse it directly benefit indirectly because the content shows up in higher-quality training crawls.
Can I have multiple llms.txt files? The standard defines a second file — llms-full.txt — that expands with more detail. Useful for documentation-heavy sites. Most businesses don't need it.
What if my content changes? Update llms.txt whenever you add a service, tool, or major page. Don't update it for every blog post.
Should I list every page? No. Curate. 20-50 links is the sweet spot for most SMBs.
What happens after you ship it
Within a few days to a couple of weeks, models that consult llms.txt will start using your file when they encounter your domain in their retrieval or training pipelines. What you'll see if you're tracking:
- Cleaner, more accurate AI descriptions of your business when you manually query ChatGPT, Claude, Perplexity, and Gemini.
- More consistent naming across models.
- Better recommendation matching for services you explicitly list.
Related reading
- <a href="/blog/ai-search-seo-playbook-2026/">AI Search SEO Playbook 2026</a> — the full playbook of which
llms.txtis one layer - <a href="/tools/ai-visibility-check/">AI Visibility Check tool</a> — see how AI models currently describe your business
- <a href="/tools/llms-txt-generator/">llms.txt Generator</a> — auto-generate a starter file from your URL
If you want help shipping llms.txt and the rest of the AI-visibility stack for your business, <a href="/services/ai-visibility-optimization/">that's what we do</a>. Or run the free tools first — no email needed — to see where you stand today.