What Is an llms.txt File, and Does Your Business Need One?
If you spend any time in marketing circles right now, you have probably heard that your website needs an llms.txt file so that ChatGPT and other AI assistants can find and recommend you. It is one of those ideas that spread faster than the evidence behind it. So before you add it to a to-do list or pay someone to set it up, here is what an llms.txt file actually is, what we genuinely know about whether it works, and how to decide if it is worth your time.
Key takeaway: llms.txt is a real but optional and unproven proposal, not a requirement. Google has said it does not use it, and a large independent study found no measurable effect on whether AI tools cite a site. For most small businesses it is cheap future-proofing at best, not a lever that moves visibility today.
What an llms.txt file actually is
An llms.txt file is a plain-text file, written in Markdown, that you place at the root of your website (for example, yoursite.com/llms.txt). Its purpose is to give large language models a clean, curated guide to your most important content.
It was proposed by Jeremy Howard, co-founder of Answer.AI, in September 2024. Howard’s proposal describes it as a way to “provide LLM-friendly content,” offering “brief background information, guidance, and links to detailed markdown files.” Importantly, the official spec says the file is expected to be “mainly useful for inference,” meaning the moment a user is actively asking an AI for help, “as opposed to for training.”
Two things are worth being clear about from the start. First, this is a community proposal, not an official internet standard. As the documentation platform Mintlify puts it, it is not official “in the way that robots.txt is an RFC. It’s a community-driven proposal by Jeremy Howard of Answer.AI.” Second, it was designed largely with technical documentation in mind, which matters when we get to whether your business specifically needs one.
What goes inside one
The spec keeps the format simple. A file needs only one required element, an H1 with the name of your site or project. Beyond that you can add an optional one-line summary in a blockquote, then optional sections (marked with H2 headings) that list links to your key pages, each as a Markdown link with a short note. A minimal example looks like this:
# Your Business Name
> A one-line summary of what you do and who you serve.
## Key pages
- [Services](https://yoursite.com/services): What we offer and who it is for
- [About](https://yoursite.com/about): Who we areThat is the whole idea. A short, human-readable map of your site, written for machines.
The honest part: do AI systems actually use it?
The honest answer is no, not in any reliable way today. This is where the marketing hype and the evidence part ways, so it is worth slowing down.
The clearest statement from a major search company is not encouraging. Google’s John Mueller wrote in mid-2025, “FWIW no AI system currently uses llms.txt.” He added that it is “super-obvious if you look at your server logs,” because the consumer chatbots people actually want traffic from “will fetch your pages … but none of them fetch the llms.txt file.” Around the same time, Google’s Gary Illyes was reported to have said plainly that Google “doesn’t support LLMs.txt and isn’t planning to,” and that ranking in AI Overviews comes down to normal SEO. (That Illyes comment comes secondhand from a recap of a live Google event rather than a Google publication, so treat it as reported, but it points the same direction as Mueller’s.)
The data backs up the skepticism. SE Ranking analyzed roughly 300,000 domains in late 2025 and found that only about 10% had an llms.txt file, so nearly nine in ten sites had not adopted it. More tellingly, when they tested whether having the file made a site more likely to be cited by AI models, they found no effect at all. Their machine-learning model actually got more accurate when they removed llms.txt from the equation, which led them to conclude the file “might currently introduce more noise than value.” SE Ranking is also one of the vendors in our roundup of AI citation trackers, where it admits there is still no industry benchmark for AI visibility at all.
It is not entirely one-sided. Some logs show OpenAI’s crawler does fetch the file on occasion, though SE Ranking notes this “doesn’t happen often.” And adoption did jump when Mintlify began auto-generating the file for the documentation sites it hosts, which is why companies like Anthropic now serve one on their docs. But notice what that is: technical documentation, used to help AI coding tools load accurate context. Even Mintlify, which is in favor of the format, concedes that “no major AI company officially supports the format” and that if “you’re optimizing purely for Google SERPs, llms.txt won’t move the needle.”
So should your business create one?
It depends on what kind of site you run, and your honest answer to “what am I expecting this to do.”
If your business publishes real technical documentation or an API reference, the case is stronger. That is the use case the format was built for, and the tools AI developers use can genuinely benefit from a clean Markdown map. If your documentation platform generates the file automatically, there is no reason not to let it.
For a typical small-business marketing site, the picture is different. Adding an llms.txt file will not, on current evidence, make ChatGPT or Google more likely to recommend you, because what earns a ChatGPT recommendation starts with crawler access and mentions on other sites, neither of which a text file supplies. The honest framing is the one even the skeptics land on. As SE Ranking puts it, “today it’s optional; tomorrow, it might be essential,” so it is reasonable to treat it as low-effort future-proofing if it is quick and free. It is not a substitute for the things that actually drive whether AI assistants can describe and recommend your business: clear pages that state who you serve and what you do, real authority signals, and content an assistant can confidently quote. Those are the same fundamentals that help you in regular search, which is exactly what Google says still matters for AI results.
Practitioners working at the front line of AI search make the same point. In a June 2026 Triptease webinar on Google and AI, Brad Brewer of Agentic Hospitality noted that llms.txt “isn’t used by any consumer-facing channel” and that “no user companies were behind it.” Sanjay Vakil, founder of DirectBooker and a former Google engineer, framed the constructive version of the argument: you “shouldn’t need an LLM.txt,” because “the information that the AI needs” should be “trivially parsable off the page.” That is the real lesson. Rather than adding a special file for machines, write pages a machine can already read: plain language, clear structure, and the facts about who you serve and what you do stated directly on the page.
Put bluntly: add it if it takes ten minutes, but do not let anyone sell you llms.txt as the thing standing between you and AI visibility. It is not.
How to create one in about fifteen minutes
If you want to add the file, you have two paths.
The manual route, per Mintlify’s guidance: create a Markdown file that starts with a # heading for your site title, add a short blockquote summary, then list your most important pages under ## sections as Markdown links. Save it as a plain text file named llms.txt and host it at the root of your domain so it loads at yoursite.com/llms.txt, the same place robots.txt lives.
The automatic route is easier if you are on a common platform. WordPress users can use Yoast SEO, which can “generate an llms.txt file automatically with a click.” Documentation platforms like Mintlify generate it for you, and free generators such as llmstxt.new can draft one from your URL. Whichever route you choose, keep the file short and the links genuinely useful, since the point is a clean map, not a dump of every page.
The honest bottom line on llms.txt
Add an llms.txt file if your platform generates it for free, treat it as minor future-proofing, and move on. What actually determines whether an AI assistant can find, trust, and recommend your business is the content on your pages, written plainly enough for a machine to read without any special file. Getting those pages right, and keeping them that way as your business changes, is the ongoing work our managed marketing pipelines handle.
If you are not sure whether AI assistants currently mention your business, our free AI visibility assessment checks and hands you a plain-English plan in a few minutes, at no cost.
Frequently asked questions
Is llms.txt an official standard?
No. It is a community proposal introduced by Jeremy Howard of Answer.AI in September 2024. As Mintlify notes, it is not official “in the way that robots.txt is an RFC.”
Does Google use llms.txt?
No. Google’s Gary Illyes was reported to have said Google “doesn’t support LLMs.txt and isn’t planning to,” and Google’s John Mueller stated that “no AI system currently uses llms.txt.” Google’s position is that normal SEO is what helps you appear in AI results.
Will an llms.txt file help me rank or get cited by ChatGPT?
There is no evidence it will today. A study of roughly 300,000 domains found no measurable effect on how often AI models cited a site, and no major AI provider confirms using the file for ranking or citations.
Who actually benefits from llms.txt right now?
Sites with real technical documentation or API references, where AI coding tools use the file to load accurate context. That is the use case it was designed for.
Should my small business add one anyway?
Only if it is quick and free, as low-effort future-proofing. It will not improve your AI visibility on its own. Your time is better spent on clear, well-structured, trustworthy content, which is what genuinely helps AI assistants understand and recommend you.
