Who Benefits From the Robots.txt & LLMs.txt Generator
Reviewed by the OnlineFree.app team · Updated
Key points
- The Robots.txt & LLMs.txt Generator writes both crawler files from one domain, one path list and one AI-crawler policy.
- block_training_allow_search blocks GPTBot, Google-Extended, CCBot, anthropic-ai and Bytespider while allowing OAI-SearchBot and PerplexityBot.
- robots.txt is a widely honoured convention, not access control; protect private paths with authentication instead.
- The generated llms.txt mirrors your disallow paths in a plain-language "Do not crawl" section with placeholder page links.
- Always verify the published files at the domain root, because a robots.txt in a subfolder is ignored.
What the Robots.txt & LLMs.txt Generator produces
The Robots.txt & LLMs.txt Generator is a free one-screen tool that turns a domain, a list of disallow paths and one AI-crawler policy choice into a complete robots.txt plus a matching llms.txt starter file, each ready to copy or download with no signup, no crawling and no build step.
You type the site origin once. The tool normalizes the protocol and trailing slash, then reuses that value in two places: the Sitemap line at the bottom of robots.txt and the H1 header of llms.txt. Blank lines and lines beginning with # are ignored in the path box, so you can leave yourself notes without breaking the output. Everything re-renders on every keystroke, and validation errors appear directly under the offending field rather than at the bottom of the page.
The two files land in monospace panels — stacked on mobile, side by side on desktop — each with a file-name header, a copy button and a download button. Paste the result, upload it to your web root, and you are done. If you want to see the layout before typing anything, open the Robots.txt & LLMs.txt Generator and fill in a placeholder domain first.
Who benefits most from this tool
The people who get the most out of this generator are site owners, indie developers and technical SEOs who already know what they want to block but not the exact strings to write. Crawler user-agents are case-sensitive-ish in practice and easy to mistype — "ClaudeBot" versus "anthropic-ai" versus "Claude-Web" are three different tokens — and a single typo produces a rule that silently does nothing.
The second group is anyone running many small sites: freelancers, agencies and makers shipping side projects. Writing a robots.txt by hand for the fifth client site in a week is where mistakes creep in, and a generator that always emits the same structure removes that variance. It also helps people who have never written one at all, because the output doubles as a readable template you can edit later.
The third group is the cautious middle: sites that are happy to appear in AI-powered search results but do not want their text vacuumed into training corpora. That position is awkward to express by hand, since it means allowing some crawlers from a vendor while blocking others from the same vendor. The policy menu exists specifically to make that distinction one click instead of a research project. OnlineFree.app keeps the whole toolkit free and account-free, so you can browse the rest of the free online tools while you are here.
Which AI crawler policy should you pick?
There are three choices, and the default is the middle one. allow_all writes no AI-specific rules at all — you get the standard wildcard group plus your Sitemap line, and every AI crawler is governed by whatever the wildcard says. Choose this if you want maximum visibility and do not object to training use.
block_training_allow_search is the default because it matches what most publishers describe when you ask them. It emits Disallow rules for GPTBot, Google-Extended, CCBot, anthropic-ai and Bytespider, while leaving OAI-SearchBot and PerplexityBot unblocked so your pages can still surface in AI answers that cite sources. Note that Google-Extended controls Gemini and Vertex training rather than Googlebot itself, so blocking it does not remove you from classic Google Search.
block_all disallows every known AI crawler the tool recognises. It is the right pick if you are licensing content, running a paywall, or simply want no AI reuse until you have decided otherwise. The honest trade-off: you may lose citations and referral traffic from AI assistants, and you will need to revisit the file when new crawlers appear, because no generator can list a bot that does not exist yet.
Disallow paths: syntax and common mistakes
Enter one path per line, starting with a slash. A trailing comment after a path is preserved as documentation of why the rule exists. Wildcards work: *.json$ blocks any path ending in .json, and /search? matches everything under that prefix. Keep the leading slash — a bare "admin" is not a path and will not behave the way you expect.
The classic mistake is forgetting how prefix matching works. Disallow: /admin/ blocks /admin/panel but leaves /admin itself fetchable; Disallow: /admin blocks both, along with /administrator and /admin-guide. Conversely, Disallow: / blocks the entire site, and users paste it by accident more often than you would think. If you genuinely want to allow everything, leave the path box empty rather than writing a slash.
The second classic mistake is treating this file as security. Anyone can read robots.txt, and it advertises exactly which paths you consider sensitive. Put credentials, staging environments and customer data behind real authentication; use these rules for crawl budget and courtesy, not protection.
What goes into the generated llms.txt file?
llms.txt is a Markdown convention rather than a search-engine standard: a short summary of a site written for language models, typically served at the domain root. The generator's starter file contains an H1 built from your domain, a blockquote summary line you should rewrite in your own words, a "Do not crawl" section that mirrors the disallow paths you entered, and a '## Pages' section with placeholder links.
That mirroring is the useful part. If you have told crawlers to stay out of /cart, the llms.txt says so in plain language too, which matters because not every AI tool parses robots.txt. The placeholders are placeholders: replace them with your real highest-value URLs, the pages you would want summarised if an assistant had to describe your site in three sentences.
Keep the summary line factual and short. "Example.com publishes open-source database tooling and weekly benchmark write-ups" beats marketing copy, because the file is read by a model looking for orientation, not persuasion. If the pages you list rely on heavy images, run those assets through the Free Online Photo Resize Tool first so the linked pages load quickly for human visitors too.
Honest limits and what to verify
robots.txt is a widely honoured convention, not an enforcement mechanism. RFC 9309 defines the syntax and how crawlers should interpret it, but compliant behaviour is voluntary — reputable search engines follow it, malicious scrapers ignore it entirely, and a blocked URL can still be indexed if other sites link to it. A robots.txt served from a subfolder is ignored; the file must sit at the domain root.
llms.txt is newer and less settled. Its specification lives at llmstxt.org, and adoption varies between AI products, so treat it as a helpful signal rather than a switch. As of 2026 there is no guarantee that any given assistant will read it, which is exactly why the generator gives you both files instead of selling one as a replacement for the other.
Before you ship, load https://yourdomain.com/robots.txt in a browser and check the Sitemap URL is absolute and correct, then test it in Google Search Console's robots.txt report. Re-read the file after any site restructure. If a number or a URL matters — sitemap locations, disallow paths, licensing terms — verify it against your own records rather than trusting any generator's output.
Frequently asked questions
Is the Robots.txt & LLMs.txt Generator free, and do I need an account?
Yes — the Robots.txt & LLMs.txt Generator is free and needs no signup, email or account. You enter a site origin, optional disallow paths and an AI-crawler policy on a single screen, and both files appear immediately with copy and download buttons. Because the tool never fetches or crawls your domain, there is no queue, no verification step and no build process to wait for.
Which crawlers does the block_training_allow_search policy block?
That policy emits Disallow rules for GPTBot, Google-Extended, CCBot, anthropic-ai and Bytespider, while leaving OAI-SearchBot and PerplexityBot unblocked. The intent is to refuse training use but stay eligible for AI search answers that cite and link your pages. Google-Extended governs Gemini and Vertex training, not Googlebot, so classic Search is unaffected.
Does a disallow rule keep my pages private?
No. A robots.txt entry asks compliant crawlers not to fetch a path, but the file is public, the rule is voluntary, and the URL can still be linked, shared or indexed through other signals. Sensitive areas such as admin panels, staging sites and customer data need real authentication or IP restrictions. Use disallow rules for crawl control and courtesy, never as access control.
Do I need an llms.txt file if I already have robots.txt?
Not strictly, but the two do different jobs. robots.txt carries crawler directives in a syntax search engines have honoured for decades, while llms.txt is a plain-language Markdown summary aimed at AI tools that may not parse robots.txt at all. Publish robots.txt first, then add llms.txt as a supplementary signal rather than a replacement.
Where do I upload the generated robots.txt and llms.txt files?
Both files belong at your domain root, so they resolve at https://yourdomain.com/robots.txt and https://yourdomain.com/llms.txt. A robots.txt placed in a subfolder is ignored by crawlers. After uploading, open the robots.txt URL in a browser and confirm the Sitemap line is absolute and points at the right file.