/llms.txt Generator & Token Estimator
Generate standardized /llms.txt markdown files for AI models, Perplexity, Claude, and Cursor. Provide clean, curated documentation paths that LLMs can ingest effortlessly without hallucinating outdated APIs.
Project Metadata
https://yourdomain.com/llms.txt with MIME type text/markdown or text/plain.
What Is the /llms.txt Standard and Why Does Your Project Need It?
Proposed by AI researcher Jeremy Howard (creator of fast.ai and Answer.AI), /llms.txt is a standard proposal for websites and software libraries to provide concise, structured markdown representations of their documentation specifically designed for Large Language Models. Modern AI developer tools like Cursor, Claude Code, and Perplexity use these files to rapidly ingest core technical architecture without getting bogged down by HTML navigations, cookies, and JavaScript trackers.
Official llmstxt.org Specification Structure
- H1 Project Header:
# Project Namedeclares the canonical brand or repo identity. - Blockquote Summary:
> Short project descriptionprovides an instant 1-sentence prompt injection summary. - Docs Section:
## Docslists critical markdown guides formatted as- [Title](URL): Description. - Optional Section:
## Optionalprovides deep API endpoints and advanced guides that agents can fetch on demand.
Why Use ZeroCostAI's llms.txt Generator?
- Spec-Compliant Syntax: Validates markdown output strictly against Jeremy Howard's llmstxt.org standard.
- Context Window Token Estimator: Previews the estimated token weight so your context file doesn't overload LLM prompts.
- 1-Click Instant Download: Save clean
llms.txtready for direct upload to your website root or CDN. - 100% Free & Private: Client-side generation without account requirements.
Frequently Asked Questions
Where should I put the llms.txt file?
Place the file at the root of your web server so it is publicly accessible at https://yourdomain.com/llms.txt.
Does an llms.txt replace a robots.txt file?
No. robots.txt tells crawlers which paths are allowed or forbidden. llms.txt provides curated documentation content to AI systems once crawling is permitted.