100% Free Technical SEO Diagnostic Tool

Free Robots.txt Generator (RFC 9309 Standards)

Generate custom, search-engine-ready robots.txt files online. Configure Googlebot, Bingbot, and AI crawlers with custom Allow/Disallow rules and sitemap directives.

1. Select CMS Preset

2. Default Crawler Access

3. AI Crawlers & Scrapers

4. XML Sitemap URL

5. Custom Disallow Paths

Generated Robots.txt

Why You Need a Precision Robots.txt File

The robots.txt file is the initial handshake between your web server and search engine crawlers. When Googlebot, Bingbot, or modern AI agents visit your domain, the very first file requested is /robots.txt. A well-configured file conserves server crawl budget, shields internal administrative scripts, and prevents search engines from wasting bandwidth on duplicate faceted search parameters.

Preventing Catastrophic Crawling Flaws

A single syntax typo or misplaced forward slash can inadvertently de-index an entire website or expose private staging directories. Our Free Robots.txt Generator automatically structures directives in full accordance with RFC 9309 standards, ensuring clean grouping, proper user-agent tokens, and valid sitemap references.

Managing AI Scrapers and Generative LLM Crawlers

With the rise of generative AI platforms, publishers now have distinct crawler tokens to control model training scraping (such as OpenAI's GPTBot and Anthropic's ClaudeBot) without impacting their visibility on standard search engines. Our tool includes dedicated toggles to configure these rules safely.

📋 How to Use This Tool

Step 1: Select your CMS preset (WordPress, Shopify, Next.js, or Clean/Custom).
Step 2: Choose default crawl access (Allow all or Disallow private directories).
Step 3: Configure crawler-specific rules for Googlebot, Bingbot, and AI crawlers (GPTBot, ClaudeBot, etc.).
Step 4: Enter your XML Sitemap URL.
Step 5: Click 'Generate Robots.txt', copy to clipboard, or download your robots.txt file.

💡 Practical Examples

Preset Example: WordPress preset automatically disallows /wp-admin/ while allowing /wp-admin/admin-ajax.php, and includes your sitemap URL.

✨ Key Features

One-click CMS presets (WordPress, Shopify, Next.js, Standard);
Granular AI crawler toggles (OpenAI GPTBot, Anthropic ClaudeBot, Perplexity);
Custom Allow and Disallow rule builder;
Real-time syntax preview;
One-click clipboard copy and text download.

⚠️ Limitations & Edge Cases

A generated robots.txt file must be placed in your website root directory (e.g. https://example.com/robots.txt). It cannot be hosted in a subfolder.

🚫 Common Technical Mistakes to Avoid

Disallowing admin-ajax.php in WordPress;
Forgetting the trailing slash on directories;
Leaving placeholder domains in the sitemap directive;
Blocking search engines when intending to block AI crawlers.

Frequently Asked Questions (15)

What is a robots.txt file?
Robots.txt is a plain text file located at the root of a domain that instructs web crawlers which URLs they are permitted or disallowed from requesting.
Where should the robots.txt file be uploaded?
It must always be uploaded to the root directory of your website, accessible publicly at https://yourdomain.com/robots.txt.
How do I block AI scrapers without blocking Google?
Specify dedicated User-agent sections for bots like GPTBot or ClaudeBot with Disallow: /, while keeping User-agent: * or Googlebot Allowed.
Should I include my XML sitemap in robots.txt?
Yes. Adding "Sitemap: https://yourdomain.com/sitemap.xml" helps search engine bots discover your content immediately upon crawling.
What does User-agent: * mean?
The asterisk indicates that the subsequent directives apply to all automated web crawlers unless a more specific user-agent group is declared.
Can I use wildcards in robots.txt?
Yes. Modern crawlers following RFC 9309 support the asterisk (*) as a wildcard and dollar sign ($) as an end-of-path anchor.
Why shouldn't I disallow wp-admin/ entirely?
WordPress requires /wp-admin/admin-ajax.php for frontend AJAX rendering. You should allow admin-ajax.php explicitly.
Can robots.txt protect confidential data?
No. Robots.txt is publicly visible to anyone. Confidential areas must be secured using server-side authentication (passwords, tokens).
Does this generator follow RFC 9309 standards?
Yes. All generated directives, user-agent groups, and line formats adhere strictly to IETF RFC 9309 specifications.
How do I test my newly generated file?
Copy the generated text, open our Bulk Robots.txt Tester, switch to Paste Mode, and validate test paths against your rules.
What is the maximum file size for robots.txt?
Googlebot parses up to 500 kibibytes (KiB) of robots.txt content. Our generator produces clean, lightweight files under 5 KiB.
Can I add crawl-delay in robots.txt?
Googlebot ignores crawl-delay directives, but Bingbot, Yandex, and older crawlers support it. You can manage crawl rates directly in Google Search Console.
How often do search engines check robots.txt?
Search engines typically fetch and cache robots.txt every 24 hours, or more frequently if high crawl activity is detected.
Is robots.txt case-sensitive?
Directives and paths are case-sensitive (e.g. /Private/ is different from /private/). The user-agent token is case-insensitive.
Is this generator completely free to use?
Yes. SEO Free provides 100% free technical SEO tools without subscriptions, watermarks, or account registration.