Is Robots.txt Generator & AI Crawler Blocker free to use?

Yes, Robots.txt Generator & AI Crawler Blocker is completely free with no signup or registration required. All processing happens directly in your browser.

Absolutely. Your data never leaves your device. Everything runs locally in your browser — no uploads, no servers, no tracking.

Do I need to install anything?

No installation needed. Robots.txt Generator & AI Crawler Blocker works entirely in your web browser on both desktop and mobile devices.

Robots.txt Generator & AI Crawler Policy Engine Online

Understanding robots.txt Under RFC 9309

The Robots Exclusion Protocol (REP) was standardized in September 2022 as RFC 9309 by the Internet Engineering Task Force (IETF). While the protocol has governed web crawling since Martijn Koster first proposed it in 1994, modern search engines and AI crawlers evaluate robots.txt directives using strict mathematical precedence:

Order of Precedence: The most specific rule wins. If a path matches both an Allow: and a Disallow: directive, the rule with the longest matching character pattern takes precedence.
Wildcard Matching (*): The asterisk represents zero or more characters. For example, Disallow: /*.json$ matches any file ending with .json.
End of URL Anchor ($): The dollar sign anchors the match to the exact end of the request URL.

Why Blocking AI Scrapers in robots.txt Is Essential in 2026

Modern Large Language Model (LLM) training engines and search-agent bots (such as OpenAI's GPTBot, Anthropic's ClaudeBot, ByteDance's Bytespider, and Common Crawl's CCBot) continuously harvest web content. Failing to specify crawler policies grants implicit permission to train AI models on your proprietary content without compensation or attribution.

By declaring explicit Disallow: / directives for AI user-agents while maintaining permissive access for Googlebot and Bingbot, website operators can preserve organic search traffic while preventing unauthorized AI dataset ingestion.

Frequently Asked Questions (Webmaster & SEO Engineering FAQ)

❓ Does robots.txt guarantee that search engines won't index my page?

No. Robots.txt prevents search engines from crawling the page content, but if external websites link to your URL, Google may still index the URL in search results without reading its text. To guarantee total de-indexing, you must use a <meta name="robots" content="noindex"> HTML tag or an X-Robots-Tag: noindex HTTP header.

❓ What is the difference between GPTBot and ChatGPT-User?

GPTBot is OpenAI's background crawler used to collect training datasets for future foundational AI models. ChatGPT-User is an on-demand real-time fetching agent triggered directly when an end-user prompts ChatGPT to browse a specific URL. You can block GPTBot to protect your IP while allowing ChatGPT-User so users can still reference your site in ChatGPT chats.

❓ Does robots.txt support the Crawl-delay directive?

Googlebot ignores Crawl-delay entirely; you must configure Google crawl rates inside Google Search Console. However, Bingbot, Yandex, and Baidu still respect Crawl-delay: [seconds].

❓ Where should the robots.txt file be hosted?

The file must be hosted strictly at the top-level root of your domain: https://example.com/robots.txt. Placing it in a subdirectory (like example.com/assets/robots.txt) is invalid and will be ignored by all compliant crawlers.

❓ Does the order of User-agent groups matter?

Compliant crawlers parse the entire file and look specifically for the most specific matching User-agent: record. If a crawler finds an exact match (e.g. User-agent: Googlebot), it evaluates ONLY that group and ignores the generic User-agent: * group.

❓ Are rules case-sensitive in robots.txt?

Directive names (like User-agent:, Disallow:, Allow:) are case-insensitive. However, path parameters (like /Admin/ vs /admin/) are strictly case-sensitive on Unix/Linux-based web servers.