What is LLMSTXT and How Is It Used?

Artificial intelligence and large language models (LLMs) have become some of the most talked-about areas in technology in recent years. To improve the development, management, and efficiency of these models, many new structures and file types have emerged. One of the most prominent among these is the LLMS.txt file.

What is LLMS.txt?

LLMS.txt is a text-based configuration file used in applications or systems that work with large language models (LLMs). It contains essential information such as how the model is used, its configuration, license details, and usage notes.
Although it is a simple text file, its content provides guiding information about the purpose and proper usage of the model.
It is typically located in the same directory as the model files and is especially used as a standard reference and guidance tool in open-source LLM projects.

When Did LLMS.txt Emerge?

The LLMS.txt standard is a relatively new development. It was proposed by Jeremy Howard in September 2024, arising from the inadequacy of traditional web standards for AI systems.
Rapid advances in AI technology and the challenges faced by large language models in processing web content led to the creation of this new format.

What Is LLMS.txt Used For?

LLMS.txt provides numerous benefits for both developers and end users. The table below summarizes the main purposes of the LLMS.txt file:

File Format and Structure of LLMS.txt

The LLMS.txt file should be in plain text format and include the following core components:

Common Use Cases for LLMS.txt

The LLMS.txt file is a powerful tool that enhances the visibility and accessibility of your website in the AI era. When created and maintained correctly, it can increase your site’s organic traffic and improve user experience. Websites that adopt this technology early are likely to gain a significant competitive edge in the future.

For e-commerce platforms, the LLMS.txt file can include product categories, brand information, and important page structures. This allows AI systems to more effectively suggest your products when responding to customer queries.

LLMSTXT is essentially a new type of “SITEMAP” designed for large language models to explore and interpret web content without restrictions.
Blog sites can use it to share main categories, popular posts, and author information.
Corporate websites can include their services, contact information, and basic company details in the LLMS.txt file to become more visible on AI platforms.

Is LLMS.txt Mandatory?

Currently, the LLMS.txt file is not mandatory. However, it is recommended if you want AI systems to better understand your website. In the future, this file may become a standard requirement.

How Often Should LLMS.txt Be Updated?

It is recommended to update the LLMS.txt file after any significant changes to your website. You should revise the file when you add new pages, change your main categories, or make major structural changes to your site.

Important Considerations When Using LLMS.txt

The content of the LLMS.txt file should be structured in a way that AI systems can easily process. It should not contain complex HTML code and must be prepared in plain text format.

To be effective, the file should include your website’s most important pages, main categories, and essential information. The content must be clear and descriptive so that AI systems can easily understand your site’s structure and purpose.

When creating the LLMS.txt file, it's crucial to determine which parts of your website you want AI systems to process. Sensitive data, personal information, or content you do not want processed should be excluded from the file.