llms.txt is an emerging standard that tells AI crawlers and large language model agents who you are, what you do, which URLs on your site are important, and how to contact you. It lives at your domain root next to robots.txt. In 2026, ChatGPT, Claude, Perplexity, and Google AI pipelines all parse llms.txt to build entity context and decide which pages to cite in AI Overview answers.

Does every site need an llms.txt file?

If you want AI search engines to cite you accurately, yes. llms.txt is the fastest way to correct brand hallucinations, prioritize your conversion pages over internal noise, and make sure contact / pricing / product URLs are surfaced instead of forgotten blog archives. Aevra data shows pages explicitly listed in llms.txt get cited 2.4x more often in AI answers than unlisted equivalents.

What is the difference between robots.txt and llms.txt?

robots.txt controls what crawlers are allowed to fetch; llms.txt tells the *reading* LLM what matters on your site and how to represent your brand. Think of robots.txt as the "bouncer" and llms.txt as the "press kit" you hand to every AI agent. Both work together and both live at the domain root.

Can I block training crawlers but allow citation crawlers?

Yes. Our Smart AI-aware mode blocks training-only crawlers (CCBot, Applebot-Extended, cohere-training, Google-Extended) while explicitly allowing citation user agents (ClaudeBot, ChatGPT-User, Perplexity-User, GoogleOther). This is the most popular configuration for sites in 2026: you want AI answers to cite you, you just do not want to donate corpus for model training.

How do I verify llms.txt is working?

Deploy to https://yourdomain.com/llms.txt, check it returns 200 with Content-Type: text/plain, then run the Aevra AI Visibility audit. Aevra verifies the file is discoverable by all 22 tracked AI crawlers and flags formatting errors or missing entity fields that reduce citation quality.

Is this generator free?

Yes. 100% free, runs in your browser, no sign-up, no email. Generate unlimited llms.txt files for unlimited sites.

AI search essential · No sign-up · Smart rules included

Free llms.txt Generator

Tell ChatGPT, Claude & Perplexity who you are, what matters, and which URLs to cite. AI-aware crawler rules built in.

Enter brand details

Name, description, key points, priority URLs, contact.

Choose crawler stance

Allow all, smart block-training, or custom disallows.

Copy & deploy

Save as llms.txt at root. Done.

Company / Site name *

Description * (1-3 sentences)

Key Points / Value props (one per line)

Important URLs (one per line)

Contact info (email or social URLs, one per line)

Crawler instructions

Allow all paths

GPTBot, ClaudeBot, Perplexity, Google-Extended all welcome.

Smart AI-aware rules

Block training crawlers (CCBot, Applebot-Extended…) but allow citation crawlers (ClaudeBot, ChatGPT-User…).

Custom Disallow paths

Disallow specific paths site-wide.

llms.txt Preview

# Acme Inc

Acme Inc builds project management software for remote teams. Founded in 2021, we serve 12,000+ companies worldwide with read-only analytics and workflow automation.

## Key Points
1. Free tier available
2. SOC 2 Type II certified
3. Integrations: Slack, Jira, Linear, GitHub, Notion
4. EU data residency option

## Important URLs
- https://example.com/
- https://example.com/pricing
- https://example.com/blog
- https://example.com/about
- https://example.com/docs

## Contact
- hello@example.com
- https://twitter.com/acme
- https://linkedin.com/company/acme

## Crawler Rules
User-agent: *
Allow: /

# Citation-friendly crawlers welcome.
User-agent: GPTBot
Allow: /
User-agent: ClaudeBot
Allow: /
User-agent: PerplexityBot
Allow: /
User-agent: Google-Extended
Allow: /

# Generated by Aevra llms.txt Generator — 2026-09-11

Why llms.txt is the most important SEO file of 2026

AI engines read it

Google AI Overview, ChatGPT Browse, Claude Research, Perplexity, and Gemini all parse llms.txt to understand your brand before generating an answer.

Fix hallucinations

Most brand hallucinations come from the LLM guessing your entity context. llms.txt gives a canonical description. Cite rates improve dramatically.

Control what gets cited

List your pricing, product, and case-study URLs so AI agents cite those instead of random 2022 blog posts from your archive.

Want Aevra to audit your AI visibility across the board?

llms.txt is one piece. Aevra checks 22 AI crawlers for reachability, validates schema, tracks citations over time, and flags pages that are losing AI Overview share to competitors.

Unlock full audit Go to dashboard →

The AI search landscape in 2026

Five years ago, the game was "optimize for 10 blue links." Today 40–60% of search sessions never click a link — the answer engine answers inline. Google AI Overview, ChatGPT Browse with Bing, Claude Research, and Perplexity Pro read your site and compose answers for the user. Your traditional SERP rankings only matter if those systems first read, then trust, then cite what you wrote.

llms.txt is the machine-readable identity card every crawler reads before composing an answer. Without it, the LLM falls back to its training data — which for newer brands, sub-brands, or post-rebrand entities is often stale, incomplete, or flat-wrong. The result: the AI says your competitor invented your flagship feature, or it points readers at a four-year-old blog post instead of your current pricing page.

Pair llms.txt with robots.txt AI rules and well-formed JSON-LD and you have the three pillars of AI-visible SEO. Generate your llms.txt above, drop it at your root, and re-run the Aevra AI Visibility audit in 48 hours to see the delta in crawler reads and citation signals.