Free Tool

# Free LLMs.txt Validator & Checker

Validate and Check your LLMs.txt file to ensure it follows the official specification and helps AI models understand your business.

## Check DomainPaste Content

Enter your domain

Validate

We'll check your domain for a valid LLMs.txt file at /llms.txt

### Validating, this may take 5-10 seconds...

Paste your LLMs.txt content

Paste your LLMs.txt content above to validate it against the specification

### PASS - Fully Compliant

LLMs.txt is properly formatted and follows the official specification

**HTTP Status**  
200  
**File Size**  
0 B  
**Lines**  
0

### Issues Found

### Suggestions

LLMs.txt Content

```

```

#### Need help fixing these issues?

Use our [LLMs.txt Generator](/content/free-tools/llms-txt-generator/index.html) to automatically create a properly formatted file for your website.

## Why Validate Your LLMs.txt?

A properly formatted LLMs.txt file ensures AI models can accurately understand and recommend your business. Our validator checks your file against the [official specification](https://llmstxt.org/) to catch common mistakes.

### What We Validate

#### File Accessibility & Structure

Verifies your LLMs.txt file is publicly accessible at /llms.txt and follows the required structure with one H1 title and proper H2 sections

#### Markdown Formatting

Validates proper use of markdown links, lists, and blockquotes following the official specification

#### Content Quality & Size

Checks file size limits (recommended under 50 KB) and ensures adequate content depth for AI models

### Common Issues We Find

- **Multiple H1 headings** — Use only one H1 for your project name
- **Deep heading levels (H3+)** — Stick to H1 and H2 for better AI parsing
- **Missing blockquote summary** — Add a brief description after your title
- **Improperly formatted links** — Use markdown format: - \[Title\](url): Description

### How to Fix Common Problems

1

#### Review the Issues

Check the validation results above for specific problems with your file

2

#### Fix Your Content

Update your LLMs.txt file based on the suggestions provided

3

#### Re-validate

Run the validator again to ensure all issues are resolved

#### Need help fixing these issues?

Use our [LLMs.txt Generator](/content/free-tools/llms-txt-generator/index.html) to automatically create a properly formatted file for your website.

#### Valid LLMs.txt Example

```
# Radarkit

> AI SEO software that drives predictable results in Google, ChatGPT, and everywhere customers are searching.

## Services
- [AI Visibility Tracking](/content/features/index.html): Monitor brand mentions across AI platforms
- [Competitor Analysis](/content/competitor/index.html): Compare AI visibility against competitors

## Legal
- [Privacy Policy](/content/privacy/index.html): Review our privacy policy
- [Terms of Service](/content/terms/index.html): Read the official terms of service
```

### Track Your Brand's AI Visibility

Analyze how AI answers for the keywords your brand wants to rank. We prompt LLM interfaces directly, not APIs.

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