What Is llms.txt?

llms.txt: llms.txt is a plain-text file at the root of a website that gives AI crawlers a structured summary of the business, its services, and its most important pages, similar to how robots.txt guides search crawlers.

In Plain Terms

llms.txt is a simple text file, written in plain markdown, that sits at the root of a website and gives AI crawlers a structured summary of the business: what it does, its main services, and links to its most important pages. It works on the same principle as robots.txt, which has told search crawlers what to index or skip for decades — except llms.txt is aimed specifically at AI tools trying to understand what a site is and route to the right page.

Instead of an AI crawler trying to piece together what a business does from scattered marketing copy across dozens of pages, llms.txt hands it a short, direct summary up front — company name, one-line description, and a linked list of the pages that matter most.

It's a newer, still-evolving standard, not yet universally supported by every AI tool the way robots.txt is by every search engine. But adoption is growing quickly, and it costs very little to publish one.

Example

Mfgwebdesign.com's own llms.txt file lists the business, its services, its free tools, and links to specific pages an AI tool should route to for common questions — like sending "manufacturing website cost" queries directly to the pricing guide instead of leaving the model to guess. See it live at mfgwebdesign.com/llms.txt.

Why It Matters for Manufacturers

Most manufacturing websites have never been read by an AI crawler in any structured way — the crawler is left to interpret marketing copy the same way a first-time visitor would, and often gets basic facts wrong as a result. An llms.txt file is a low-effort way to hand over accurate facts directly instead of hoping they're inferred correctly.

How MFG Web Design Handles llms.txt

We publish and maintain an llms.txt file as part of AI visibility work, alongside the human-readable companion page at /llm-info/ that covers the same facts in more depth for visitors and AI tools alike.

Frequently Asked Questions

Where does an llms.txt file live on a website?

At the root of the domain, the same location as robots.txt — for example, mfgwebdesign.com/llms.txt. AI crawlers check that exact location, so it has to sit there, not buried in a subfolder.

Does llms.txt guarantee an AI tool will cite a site?

No. It's a discovery aid, not a ranking signal with guaranteed results — it makes it easier for a crawler to find and correctly summarize the business, alongside other factors like schema markup and content quality.