# llmtxt.info > llmtxt.info is a bilingual (EN/FR) reference site about the llms.txt proposal — what it is, how it works, how to build one, with a free in-browser validator and generator. This file is the canonical /llms.txt for llmtxt.info. The site is a neutral, open-source reference on the llms.txt convention originally proposed by Jeremy Howard (Answer.AI) in September 2024. The pages below are the highest-signal entry points for LLM clients. For the full corpus, see /llms-full.txt. Last reviewed 2026-04-22. ## Foundations - [What is llms.txt](https://llmtxt.info/what-is-llms-txt/): definition, origin, and 2026 adoption status. - [How it works](https://llmtxt.info/how-it-works/): file structure, syntax, and parsing rules. - [Comparison](https://llmtxt.info/comparison/): llms.txt vs robots.txt vs sitemap.xml vs llms-full.txt. - [Benefits and limitations](https://llmtxt.info/benefits-limitations/): what it does and does not do. - [Does llms.txt work?](https://llmtxt.info/does-llms-txt-work/): evidence by use case — AI citations, SEO, developer tooling. - [What is llms-full.txt](https://llmtxt.info/llms-full-txt/): the full-content companion file explained. - [llms.txt and SEO](https://llmtxt.info/llms-txt-seo/): what it does and does not do for search rankings and GEO. ## Build guide - [How to create llms.txt](https://llmtxt.info/how-to-create/): templates and per-stack deployment. - [Best practices](https://llmtxt.info/best-practices/): ten rules and common mistakes. - [Examples](https://llmtxt.info/examples/): real-world llms.txt files from Anthropic, Cloudflare, Stripe, Mintlify, Vercel, Perplexity. - [llms.txt for Cloudflare Pages](https://llmtxt.info/llms-txt-cloudflare/): static output directory, Pages Function, or Workers — with cache header guide. - [llms.txt for Vercel](https://llmtxt.info/llms-txt-vercel/): static public/ file, Next.js Route Handler, or Vercel Edge Function. - [llms.txt for Next.js](https://llmtxt.info/llms-txt-nextjs/): static file or Route Handler — two approaches. - [llms.txt for WordPress](https://llmtxt.info/llms-txt-wordpress/): FTP upload, functions.php rewrite, or .htaccess redirect. - [llms.txt for Astro](https://llmtxt.info/llms-txt-astro/): static public/ file or TypeScript endpoint with getCollection(). - [llms.txt for SvelteKit](https://llmtxt.info/llms-txt-sveltekit/): static static/ file or +server.ts endpoint, works with all adapters. - [llms.txt for Hugo](https://llmtxt.info/llms-txt-hugo/): static/ file or custom output format with Go template. - [llms.txt for Express.js](https://llmtxt.info/llms-txt-express/): Node.js/Express route handler or express.static() middleware. - [llms.txt for Laravel](https://llmtxt.info/llms-txt-laravel/): place in public/ or add a route in routes/web.php. - [llms.txt for headless CMS](https://llmtxt.info/llms-txt-cms/): generate from Contentful, Sanity, or Strapi at build time. ## Tools - [Validator](https://llmtxt.info/validator/): paste a file or fetch a URL, get spec-compliant diagnostics. - [Generator](https://llmtxt.info/generator/): fill a form, preview live, copy or download a valid file. - [llms.txt checker](https://llmtxt.info/llms-txt-checker/): free online validator — checks spec compliance, URL format, and structure. ## Reference - [FAQ](https://llmtxt.info/faq/): twenty straight answers. - [Glossary](https://llmtxt.info/glossary/): AEO, GEO, RAG, MCP, REP, and the rest. - [llms.txt format reference](https://llmtxt.info/llms-txt-format/): complete spec reference — required elements, link syntax, common mistakes. ## Blog - [Blog](https://llmtxt.info/blog/): articles on llms.txt, GEO, AI crawlers, and LLM optimization. - [llms.txt vs robots.txt](https://llmtxt.info/blog/llms-txt-vs-robots-txt/): key differences between the two files. - [What is GEO?](https://llmtxt.info/blog/what-is-geo/): generative engine optimization explained. - [llms.txt best practices 2025](https://llmtxt.info/blog/llms-txt-best-practices-2025/): practical DO/DON'T guide. - [AI crawlers explained](https://llmtxt.info/blog/ai-crawlers-explained/): how Perplexity, ChatGPT, and Claude read your site. - [llms.txt for API products](https://llmtxt.info/blog/llms-txt-for-api-products/): a developer's guide. - [llms-full.txt guide](https://llmtxt.info/blog/llms-full-txt-guide/): the extended spec explained. - [Measure llms.txt impact](https://llmtxt.info/blog/measure-llms-txt-impact/): track AI referral traffic and citations. - [llms.txt for documentation sites](https://llmtxt.info/blog/llms-txt-documentation-sites/): structure for AI readability. ## French versions - [Qu'est-ce que llms.txt](https://llmtxt.info/fr/qu-est-ce-que-llms-txt/): définition et origine. - [Comment ça marche](https://llmtxt.info/fr/comment-ca-marche/): structure et parsing. - [Comment créer llms.txt](https://llmtxt.info/fr/comment-creer/): templates et déploiement. - [Comparaison](https://llmtxt.info/fr/comparaison/): llms.txt vs robots.txt vs sitemap.xml. - [Format llms.txt (FR)](https://llmtxt.info/fr/llms-txt-format/): référence complète du format — les 4 règles, exemples annotés, erreurs courantes. - [Validateur](https://llmtxt.info/fr/validateur/): outil navigateur. - [Générateur](https://llmtxt.info/fr/generateur/): formulaire + téléchargement. - [FAQ FR](https://llmtxt.info/fr/faq/): vingt réponses en français. - [llms.txt et SEO (FR)](https://llmtxt.info/fr/llms-txt-seo/): impact sur le référencement Google et trafic IA. - [Est-ce que llms.txt fonctionne ? (FR)](https://llmtxt.info/fr/est-ce-que-llms-txt-fonctionne/): évaluation par cas d'usage. ## Optional - [Homepage](https://llmtxt.info/): site entry point. - [French homepage](https://llmtxt.info/fr/): point d'entrée FR. - [Sitemap](https://llmtxt.info/sitemap-index.xml): full URL list. - [robots.txt](https://llmtxt.info/robots.txt): crawler policy.