No. robots.txt is a voluntary standard. Reputable crawlers respect it, but it cannot technically prevent access — for that, use server-level blocking such as a firewall or user-agent filtering.
Free Webmaster Tool
robots.txt, llms.txt & security.txt Generator
Control which search engines and AI crawlers can access your site, curate what AI agents see when they're allowed in, and publish a standard security contact file — all in one place.
- ✔ robots.txt with AI bot presets
- ✔ llms.txt (llmstxt.org spec)
- ✔ security.txt (RFC 9116)
- ✔ Free Forever
Three Standards, One Toolkit
robots.txt tells search engines and AI crawlers what they're allowed to access — increasingly important now that AI companies run dedicated crawlers (GPTBot, ClaudeBot, Google-Extended, and others) separate from their search indexers, each with different opt-out behavior.
llms.txt is the emerging llmstxt.org standard: a curated Markdown index at your site's root that helps AI agents and assistants find your most important content quickly, for the crawlers you do allow through.
security.txt (RFC 9116) gives security researchers a standard place to find your vulnerability disclosure contact, so a real report doesn't get lost in a general inbox.
How It Works
1. Pick a Generator
Choose robots.txt, llms.txt, or security.txt.
2. Fill In the Details
Select bots to block, list your key pages, or add your security contact.
3. Deploy
Copy the result and place it at the exact path shown for that file.
Standards Explained
What Each File Controls
robots.txt
Access control. Tells crawlers — search engines, AI bots, and scrapers — what they may and may not fetch.
llms.txt
Content curation. A hand-picked index of your best pages, for the AI agents you do allow through.
security.txt
Vulnerability disclosure. A standard place for a security researcher to report an issue responsibly.
FAQsrobots.txt, llms.txt & security.txt
Does blocking a bot in robots.txt guarantee it won't crawl my site?
Is llms.txt an official web standard?
It's an emerging convention proposed at llmstxt.org, not a formal standard ratified by a standards body. Adoption is growing, particularly among documentation platforms, but AI systems are not universally guaranteed to read it.
Where exactly does security.txt need to live?
RFC 9116 requires it at /.well-known/security.txt. Publishing a copy at /security.txt as well (ideally redirecting to the .well-known location) is common for backward compatibility with older tools.
Is my information uploaded anywhere?
No. All three generators run entirely in your browser using JavaScript. Nothing you enter is sent to our servers.