LLMs.txt Validator

Validate Your LLMs.txt Instantly

Enter your website URL and quickly check if your AI configuration files are error-free and properly formatted!

Free to use
Quickly validate
No signup required

Supported Formats

JSON, Markdown, key:value pairs, HTML anchor tags, bare URLs, and structured URL → Title → Description blocks

Why Use It?

Catch formatting errors early, improve AI compatibility, and save valuable development time with instant validation

How It Works?

Upload or paste your website URL, click validate, and instantly receive clear, actionable results with detailed feedback.

What is LLMs.txt?

LLMs.txt is an emerging file convention designed to help Large Language Models (LLMs) and AI tools better understand and interpret configuration instructions. By following this standard, developers can ensure their AI applications receive clear, properly formatted guidance, leading to more accurate and reliable AI behavior. The format supports multiple syntax styles and provides a consistent way to communicate with AI systems across different platforms and implementations.

Valid vs Invalid LLMs.txt File

Understanding what works and what doesn't.

# Company Blog Posts
https://blog.company.com/ai-future
Title: The Future of AI
Description The impact of artificial intelligence
https://blog.company.com/machine-learning
The basics of machine learning
A comprehensive guide to ML fundamentals
[Error: Missing title marker and inconsistent format]

                            
  • Missing "Title:" marker for second URL
  • Missing "Description:" marker for second URL
  • Inconsistent formatting between entries

Key Benefits

The smarter, faster way to ensure your files are perfect

Lightning Fast Validation

Get instant feedback on your LLMs.txt files with our optimized validation engine. Process files of any size in milliseconds.

High Accuracy

Our advanced validation algorithms ensure precise error detection and format verification for all supported syntax styles.

AI Compatibility

Ensure your configuration files work seamlessly with all major LLM platforms and AI tools in the market.

Smart Error Detection

Receive detailed error reports with suggestions for fixes, making debugging and optimization straightforward.

Industry-Ready LLM File Formats

Explore standardized formats tailored for different industries

Healthcare LLMs Format

Optimized for medical data processing and patient care automation

# Healthcare AI Configuration
BASE_MODEL: medical-llm-v2
SPECIALIZATION: patient-care

ALLOWED_ENTITIES:
- Patient Records
- Medical History
- Treatment Plans
- Lab Results

COMPLIANCE:
- HIPAA: strict
- Data Encryption: required
- Access Control: role-based

MODEL_BEHAVIOR:
- Accuracy Threshold: 0.99
- Confidence Scoring: enabled
- Medical Terminology: standardized

                            
Ensures HIPAA compliance and patient data protection
Standardized medical terminology processing
Role-based access control integration

Common Mistakes to Avoid

Learn from these frequent pitfalls to ensure optimal LLMs.txt implementation

Incorrect Formatting

Section:
url: example.com
title:Missing Space
description:Inconsistent

                                    
Section:
URL: example.com
Title: Proper Spacing
Description: Consistent Format
  

Inconsistent Indentation

Section:
URL: example.com
  Title: Wrong Indent
    Description: Messy

                                    
Section:
  URL: example.com
  Title: Proper Indent
  Description: Clean

                                    

Missing Required Fields

URL: example.com
(Missing Title)
Description:
  
URL: example.com
Title: Complete Entry
Description: All Fields Present
  

Invalid Characters

URL: http://example.com/path@
Title: Special&chars#here
Description: Using\wrong/chars
  
URL: https://example.com/path
Title: Clean Title Here
Description: Proper Characters
  

Frequently Asked Questions

Currently, only standard LLMs.txt formats are supported (JSON, Markdown, key:value, HTML anchor tags, bare URLs, structured URL→Title→Description). Custom schemas are not yet supported.

We support multiple formats including JSON, Markdown, key:value pairs, HTML anchor tags, bare URLs, and structured URL → Title → Description blocks. All common LLMs.txt syntax styles are fully supported.

No signup or account is required. The tool is free and available instantly in your browser.

The validator checks for missing fields, incorrect syntax, inconsistent formatting, and invalid characters across supported formats.

No, we do not store or log your uploaded content. All validation happens securely in real-time.