Generador Robots.txt

A Robots.txt file is a foundational text file that lives in the root directory of your website (e.g., tools.com/robots.txt). It serves as a set of instructions for "Web Crawlers"—the automated bots used by Google, Bing, and other search engines to index the web. A Robots.txt Generator allows you to build these instructions precisely, ensuring you don't accidentally block your site from search results while keeping private areas hidden.

The generation engine organizes your crawler directives into a standardized format:

1. User-Agent Identification: The tool allows you to target specific bots (e.g., Googlebot, Bingbot) or use the wildcard * to target all crawlers.
2. Directive Mapping: The engine applies the two primary commands:
   • Disallow: Tells the bot not to visit specific folders or pages (e.g., /admin/).
   • Allow: Specifically permits a bot to visit a subfolder inside a disallowed parent.
3. Crawl-Delay (Optional): For servers with limited resources, the tool can request that bots wait a specific number of seconds between page requests. Note that Googlebot ignores this directive.
4. Sitemap Integration: The engine appends the absolute Sitemap URL to the end of the file, giving crawlers a "Roadmap" of your entire site structure.
5. Strict Syntax Check: The tool ensures the final output follows the Robots Exclusion Protocol (REP), preventing errors that could lead to indexing failures.

The History of Robots.txt and Martijn Koster

The Robots Exclusion Standard was proposed in 1994 by Martijn Koster. He created it after his server was accidentally overwhelmed by one of the web's first crawlers.

Koster realized that as the web grew, servers needed a way to signal their limits to automated systems. Over decades, the protocol remained an "informal agreement" until 2019, when Google led the effort to make it an official IETF Internet Standard. Today, robots.txt is the first file any reputable search engine looks for when visiting a new domain.

Technical Comparison: Robots.txt vs. Meta Robots vs. Password Protection

Choosing the right level of "Hidden" depends on whether you want to prevent indexing or prevent access.

Feature	Robots.txt (File)	Meta Robots (Page)	Password (.htaccess)
Visibility	Publicly viewable	Page Source viewable	Hidden
Indexing	Prevents Crawling	Prevents Indexing	Prevents Crawling & View
Best For	Site-wide rules	Specific page rules	Sensitive Admin Areas
Authority	Request (Polite)	Request (Polite)	Enforcement (Guaranteed)
Level	Domain Root	Page Header	Server Level

By using a dedicated Robots.txt Generator, you maintain "Crawl Budget" efficiency, ensuring search engines focus their energy on your most important content.

Security Considerations: Hidden but not Secret

It is a common mistake to use robots.txt for security:

• Security through Obscurity: Never put sensitive URLs (like yoursite.com/private-client-data/) in robots.txt. Since the file is public, hackers often check it first to find "Hidden" folders to attack.
• Bot Behavior: "Good" bots (Google, Bing) follow these rules. "Bad" bots (Scrapers, Malware) often ignore them entirely. For true security, use .htaccess Password Protection.
• Wildcard Risks: A broad rule like Disallow: /user could accidentally block thousands of valid profile pages. Always test your rules with a Regex Validator.
• Client-Side Privacy: To maintain the absolute Data Privacy of your site structure, the entire file generation happens locally in your browser. Your private folder names are never sent to our servers.