llms.txt Validator
The llms.txt Validator is a free web-based tool that checks llms.txt files against the official specification. It is designed for website owners and developers who maintain a Markdown file at the site root to provide AI models with a curated map of important pages for accurate understanding and citation.
Users can enter a domain to have the tool automatically fetch and validate the /llms.txt file or paste content directly for validation of drafts or private files. It examines structure including H1 title, blockquote summary, H2 link sections, and list formatting. Every referenced URL is requested to detect broken links rather than only performing text linting.
A report provides a 0-100 score across structure, links, and best practices along with prioritized plain-English recommendations for each issue. The process involves entering a domain or content, concurrent validation of formatting and links, and generation of the scored findings list. The tool is available at no cost with no signup required.
It functions as an implementation of validation for the llms.txt standard promoted by llmstxt.org.
FreeWeb
Overview
5 featuresllms.txt Validator sits in PulseGate's AI & ML category. It focuses on validating and fixing llms.txt files to ensure AI models can properly discover and cite website content. It is built as a consumer product for website owners and developers. llms.txt Validator is free to use. llms.txt Validator is available on the web.
llms.txt Validator first shipped in 2025. Among its 5 catalogued features are domain validation, pasted content check, and link verification. The interface is available in 14 languages, including Arabic, German, and English.
Summary written by a language model from the project’s public pages.
- Domain validation
- Pasted content check
- Link verification
- Structure scoring
- Fix recommendations
Tags
llms-txtspec-validatorlink-checkerai-crawlingmarkdown-linter
AI capabilities
Text
Inference: Cloud API
Built with & integrations
Runs on
Browser
Trust & compliance
Verified signals
Indexing history
3What PulseGate has recorded for this listing
- Indexed26 Jul · 07:20 UTC7 llms.txt mistakes I see constantly (and the 30-second fix for each) verified against its public sourceSource: PulseGate · Open
- Indexed26 Jul · 06:51 UTCI made my website callable by AI agents — the three layers (with the code I shipped) verified against its public sourceSource: PulseGate · Open
- Indexed26 Jul · 06:50 UTCllms.txt vs robots.txt vs sitemap.xml: what actually does what verified against its public sourceSource: PulseGate · Open
Frequently asked questions about llms.txt Validator
- What does llms.txt Validator do?
- Llms.txt Validator focuses on validating and fixing llms.txt files to ensure AI models can properly discover and cite website content. It is catalogued under AI & ML on PulseGate.
- Who is llms.txt Validator for?
- llms.txt Validator is a consumer product built for website owners and developers.
- Is llms.txt Validator free?
- Yes — llms.txt Validator is free to use.
- What platforms does llms.txt Validator run on?
- llms.txt Validator runs on the web.
- Is llms.txt Validator still active?
- Unverified. llms.txt Validator has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.
- What projects are similar to llms.txt Validator?
- Similar projects tracked by PulseGate include llms-txt.co, llms.txt Generator, and llms.txt Generator.llms-txt.collms.txt Generatorllms.txt Generator
- When did llms.txt Validator launch?
- llms.txt Validator first shipped in 2025.
- What languages does llms.txt Validator support?
- The interface is available in 14 languages, including Arabic, German, and English.
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