Free Robots.txt Generator: Control Crawl Budget

Letting crawlers index every filter page, cart route, and admin path wastes crawl budget and exposes paths you did not intend to surface. The free robots.txt generator on ToolMars builds a syntax-correct file — block AI scrapers, disallow low-value directories, declare sitemaps — with no server upload.

Google requests robots.txt before crawling anything else on your domain. A single typo can accidentally block your entire site. A visual builder removes that risk.

What robots.txt Actually Does

robots.txt is a plain-text file at your domain root that tells compliant crawlers which paths to skip. It is not a security tool — it is a polite request. Major search engines respect it; malicious bots may not.

Key Directives Explained

• User-agent — target a specific bot (Googlebot) or * for all.
• Disallow — block a directory or path from crawling.
• Allow — permit a subpath inside a disallowed directory.
• Sitemap — absolute URL to your XML sitemap for faster discovery.

Blocking AI Scrapers

LLM training crawlers like GPTBot, ClaudeBot, and CCBot can consume bandwidth and scrape proprietary content. Add explicit Disallow rules for these user-agents while keeping Googlebot and Bingbot allowed to preserve search visibility.

How to Build Your robots.txt

Compile Logic for Developers

function compileRobotsTxt(rules: { agent: string; disallow: string[] }[], sitemaps: string[]) {
  let out = "";
  for (const r of rules) {
    out += "User-agent: " + r.agent + "\n";
    r.disallow.forEach(p => { out += "Disallow: " + p + "\n"; });
    out += "\n";
  }
  sitemaps.forEach(s => { out += "Sitemap: " + s + "\n"; });
  return out.trim();
}

Next Steps in Your SEO Stack

Pair crawl rules with optimized snippets from the SERP preview tool and JSON-LD from the schema generator. Read our meta tag guide and structured data guide to complete the foundation.

Conclusion

A correct robots.txt directs crawl budget toward pages that matter, blocks AI scrapers when you want to, and points bots to your sitemap. Generate it locally, deploy to your root, and verify in Search Console.

Frequently Asked Questions