AI Crawler & SEO robots.txt Generator

How to Configure robots.txt for Search Engines and AI Crawlers

What robots.txt Actually Controls

robots.txt is a plain-text file served from the root of a host, normally at https://example.com/robots.txt. It publishes crawler instructions using records built around User-agent, Disallow, and Allow. A rule tells a compliant crawler which URL paths it should or should not request; it does not create a password wall, remove a URL from the web, or guarantee that an untrusted bot will obey.

This generator separates ordinary search crawlers from named AI crawler tokens so you can make the intended policy explicit. For example, you can permit Googlebot and bingbot while publishing Disallow: / for GPTBot, ClaudeBot, and PerplexityBot. The result is still only a crawler-access preference: server-side authentication, firewall rules, rate limits, and application authorization are needed when access must actually be enforced.

Step-by-Step robots.txt Configuration

Step 1: Choose Search-Engine Access

Enable the search engines that should crawl your public pages. The generator creates a separate record for each selected token. If “Allow selected search engines” is enabled and no path restrictions are present, the basic record is:

User-agent: Googlebot
Allow: /

If you want a private section hidden from that crawler, add a path such as /members/. The generated record becomes:

User-agent: Googlebot
Disallow: /members/
Allow: /

Path matching has important syntax details. A trailing slash is useful when the intention is to target a directory-like URL space. A rule for /admin/ is different from a rule for /admin. Test the exact URL patterns you care about rather than assuming robots.txt behaves like a general-purpose regular-expression engine.

Step 2: Decide Which AI Crawlers to Block

Select the AI crawler tokens that match your publishing policy. This generator includes GPTBot, OAI-SearchBot, ClaudeBot, PerplexityBot, and Google-Extended. These names should be treated as specific crawler identities rather than a universal “AI bot” switch: crawler ecosystems change, and different products can use different tokens.

With site-wide blocking enabled, a selected token receives:

User-agent: GPTBot
Disallow: /

The same pattern is generated for each selected AI crawler. This is preferable to assuming that one generic user-agent string will cover every automated service.

Step 3: Add Narrow Exclusions When Necessary

Use path restrictions when your policy is more granular. For example, a site might make public articles crawlable but restrict a download directory:

User-agent: ClaudeBot
Disallow: /downloads/
Disallow: /private/

Keep URL rules as narrow as practical. Accidentally blocking CSS, JavaScript, images, or important HTML can interfere with search rendering and indexing. If the objective is simply to keep a private application area inaccessible, robots.txt is the wrong security boundary; protect that area at the server or application layer.

Step 4: Add the Sitemap URL

Enter the absolute URL of your XML sitemap. The generator places it near the bottom of the file:

Sitemap: https://example.com/sitemap.xml

Use the canonical public sitemap URL that your site actually serves. Do not put credentials, private query parameters, or internal development URLs into robots.txt.

Common robots.txt Troubleshooting Errors

Edge Cases to Check Before Publishing

• Subdomains: robots.txt is host-specific. A file on www.example.com does not automatically govern shop.example.com.
• HTTP and HTTPS: make sure the file is served on the origin and host visitors/crawlers actually use.
• CDNs and caches: a cached robots.txt can temporarily expose an older policy. Purge or revalidate the relevant cache after changes.
• URL parameters: broad patterns can unintentionally match parameterized URLs. Inspect real crawl URLs in server logs or search tooling.
• Disallow is not de-indexing: blocking crawling does not reliably remove a URL that search engines already know about. Indexing controls require a separate strategy.
• Allow versus Disallow: crawler behavior around overlapping rules can be implementation-specific. Avoid complicated overlapping patterns when a simple structure can express the same policy.

Why Client-Side Generation Improves Privacy

This page constructs the robots.txt string inside your browser with JavaScript. The sitemap URL and path entries are not required to leave the page, and there is no server-side form submission in this implementation. That reduces unnecessary exposure of internal URL patterns or site structure while you experiment with rules.

Client-side processing is not a substitute for a privacy review of the page itself. If this generator is embedded into a larger website, analytics, advertising, session replay, or third-party scripts can still transmit information independently of the generator. For a genuinely privacy-sensitive implementation, keep the tool dependency-free or audit every external script and network request.

Final Deployment Checklist

1. Generate the file and read every User-agent block before publishing.
2. Confirm the sitemap URL is absolute and publicly reachable.
3. Save the result exactly as robots.txt.
4. Serve it from the root of the relevant host, not a subdirectory.
5. Check that accidental broad Disallow rules are absent.
6. Remember that robots.txt is a crawler instruction, not an access-control mechanism.
7. Monitor crawler requests after deployment and use server/CDN controls for bots that ignore the published policy.