Control how AI crawlers (ChatGPT, Claude, Perplexity) see your site.
The new standard for AI-age SEO — like robots.txt, but for LLMs.
🛡️ Block AI Crawlers (generates robots.txt rules too)
Free — no limits. Runs in your browser.
llms.txt is an emerging standard that tells AI systems (ChatGPT, Claude, Perplexity, Google AI) which pages on your site are most important and what they're about.
Think of it as robots.txt for the AI age — while robots.txt controls crawling, llms.txt curates what AI systems should prioritize when generating answers about your brand.
Why it matters in 2026
An llms.txt file is a structured text file placed at the root of your website that provides AI language models with curated information about your site's most important content. Unlike robots.txt, which controls whether bots can crawl your pages, llms.txt tells AI systems what your site is about, which pages matter most, and how to accurately describe your brand when generating answers. It uses a simple Markdown-based format with headings, descriptions, and categorized links.
The metagenerator.org LLMs.txt Generator supports two modes: a manual editor where you define sections and links yourself, and an automatic URL-based mode that fetches your sitemap and organizes your pages into categories. You can also control which AI crawlers are allowed to access your site by generating companion robots.txt rules that block specific bots like GPTBot, ClaudeBot, or PerplexityBot while allowing others.
As AI-powered search engines like Google AI Overviews, ChatGPT with browsing, and Perplexity continue to grow, the way your site is represented in AI-generated answers becomes increasingly important. Without an llms.txt file, AI crawlers must infer your site's structure and priorities from raw HTML — often resulting in inaccurate or incomplete representations. Early adopters of the llms.txt standard report significantly higher rates of accurate AI citations and brand mentions compared to sites that rely on AI crawlers to figure things out on their own.
The rise of AI search is fundamentally changing how users discover and interact with web content. Instead of clicking through ten blue links, users increasingly receive direct answers generated by AI models that synthesize information from across the web. If your site is not properly structured for AI consumption, you risk being underrepresented or entirely absent from these AI-generated answers — even if you rank well in traditional search results.
The llms.txt file differs from robots.txt in a critical way: robots.txt is about access control (who can crawl what), while llms.txt is about content curation (what matters and why). You can use both together — robots.txt to manage which AI bots can access your site, and llms.txt to guide the ones you allow toward your most valuable content. This combination gives you fine-grained control over your presence in AI-generated search results, chatbot responses, and knowledge synthesis.
Check if AI search engines can already find you with our AI Visibility Checker. Control how traditional crawlers access your site with the Robots.txt Generator.
An LLMs.txt Generator creates the llms.txt file — a relatively new standard that tells AI language models which pages on your site to prioritize when indexing and referencing your content. Think of it as robots.txt for AI: while robots.txt controls traditional search crawlers, llms.txt guides AI systems like ChatGPT, Gemini, and Perplexity to your most important, authoritative content. The file sits at your domain's root (yoursite.com/llms.txt) and provides structured information about your site's purpose, key pages, and content hierarchy. As AI search grows, having an llms.txt file is becoming an important part of AI visibility optimization.
Without llms.txt, AI systems crawl your site randomly and may index less important pages. The file directs them to your most authoritative, comprehensive content — increasing the quality of AI references to your brand.
Major platforms and AI companies are increasingly recognizing llms.txt as a standard. Early adoption signals technical sophistication and ensures your site is ready as AI crawlers add support for the format.
By explicitly specifying which content represents your brand's expertise, you influence how AI systems understand and describe your business, products, and services in their responses.
Robots.txt blocks or allows crawlers. LLMs.txt goes further by providing context — explaining what your site is, what it offers, and which pages are most valuable. This context helps AI systems make better referencing decisions.
LLMs.txt is an emerging community standard, not an official W3C specification. It was proposed as a way to help AI systems understand websites better. While adoption is growing, not all AI systems support it yet. Implementing it now positions you ahead of the curve.
No. They serve different purposes. Robots.txt controls crawler access (what can/can't be crawled). LLMs.txt provides context about your content (what's most important and why). You should have both files for complete control over how your site is crawled and referenced.
Support is growing among AI companies and tools. The file format is designed to be forward-compatible, so implementing it now means you're ready when more AI systems add support. Even without explicit support, the structured format helps AI crawlers understand your site.