A .txt file is a document with plain text data that can be used for a lot of different things, including source code and configuration data. The basis of what a .txt file does is store information and share it. That information can be shared in many ways, and new types of .txt files are created from time to time.
We have had robots.txt for search engine bots and even humans.txt has been introduced to give credit to the build team and dependencies on the website. Now there’s llms.txt. This new type of text file is a sign of the progression and maturing of the internet as new technology comes about and artificial intelligence gains more traction.
Here’s a top-level view of what llms.txt is and why you want to know about it.
The Influence of Artificial Intelligence and Large Language Models on Searching and Web Surfing
If you haven’t heard a lot about artificial intelligence (AI) in recent years, then you may be a recluse living in the woods with no internet access. From Google Gemini to Perplexity, AI-charged tools are now being used to process more information, more accurately in less time to deliver up more detailed results.
How do artificial intelligence systems accomplish this feat? That kind of processing power requires the use of large language models (LLMs). LLMs leverage AI to comb through an insanely large amount of text data (think billions of words) to produce a human-like text summary of the information, answer a specific question, etc. in seconds.
The problem is it’s somewhat challenging for AI to cut through the clutter of non-essential code, complex HTML coding and .txt files containing various instructions that are within a website. The solution? A new type of .txt file that’s created for AI and LLMs.
A llms.txt file is at the root directory of a website. It contains a simplified version of the content for a website that can be read by large language models to process the information more accurately and more quickly.
The llms.txt file is special in that it’s structured using Markdown. Right now language models use Markdown to figure out where to find information because it’s the easiest for LLMs to digest. The llms.txt file was first introduced in September 2024 as a way to help AI systems read data more readily despite things like confusing, complex HTML structures, Javascript and navigation getting in the way.
What Makes llms.txt Files Different
One of the biggest differences with a llms.txt file is that it’s structured using Markdown rather than XML. It’s also specifically created with artificial intelligence in mind, which hasn’t been the case previously.
Another feature worth pointing out is that llms.txt files are created to be readable by large language models and human beings.
Llms.txt vs. Robots.txt
You may be wondering how llms.txt varies from the well-known robots.txt. The most important thing to know is that llms.txt is for artificial intelligence optimization, also known as generative engine optimization (GEO), and robots.txt is for search engine optimization. It’s possible that in the future these two files will be merged into a single file, but for now you’ll have to use both.
Llms.txt
Primary purpose: AI optimization
What It Does: Helps LLMs better process content of a website.
Robots.txt
Primary purpose: Search engine optimization
What It Does: Influences how search bots crawl a website, including what pages can be searched.
Llms.txt Files Are For More Than Large Language Models
The primary driver behind the emergence of llms.txt files is to help LLMs process data by presenting it in a very clear format, but they are useful for other reasons. Some of the noted uses include:
- Allows developers to access software documentation more easily.
- Helps outline the structure of a website.
- Answering questions about site content.
The llms.txt could also help with searches within a website, which is particularly useful for large websites containing many pages of information as well as online education platforms with lots of courses and resources.
The real takeaway is that the possibilities of how llms.txt files can be used are just beginning to be explored and will certainly be expanded.
Quick Adoption of the Llms.txt Markdown File – But Not by the Biggest Player
Although llms.txt files promise to improve AI-generated search results, data process and more, it’s still not clear how widely the file type will be adopted. The biggest question is whether or not Google is going to factor in llms.txt files. While that’s uncertain, one thing that is clear is others are getting onboard with llms.txt very quickly.
Maybe it’s just the fast-moving times we live in or the rapid expansion of AI, but the .md extension is catching on fast. GitHub reports that any project using nbdev is automatically generating pages with a clean Markdown version.
Because AI and the use of large language models will only become more prominent, the llms.txt file should become more commonplace. However, time will tell how important the llms.txt file becomes or if another solution is introduced. In these early wild west days of artificial intelligence anything is possible.
At Bruce & Eddy, our technical experts stay on top of the latest innovations like llms.txt, helping make your site easier for both search engines and AI tools to read.
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