llms.txt.

llms.txt is a standardized Markdown file proposed in 2024 that sits in a website's root directory (e.g. dlm-digital.ch/llms.txt). It summarizes a website's most important content, services and links in a clear structure optimized for large language models. The goal: AI systems should grasp the core information quickly and correctly, without having to work through HTML, navigation and scripts.

The comparison helps: what robots.txt and sitemap.xml are for classic search engine crawlers, llms.txt is for AI crawlers and generative search systems. While a website contains many design and technical elements for humans, an AI primarily needs clear, factual text. llms.txt delivers exactly that — curated and prioritized. It is often complemented by an llms-full.txt with the complete content.

For Generative Engine Optimization (GEO), llms.txt is an important building block: it increases the likelihood that AI systems reproduce and cite your brand, services and facts correctly. DLM Digital deploys llms.txt, llms-full.txt and clean robots.txt permissions for AI crawlers (e.g. GPTBot, PerplexityBot) by default — as part of every GEO strategy.