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The robots.txt file is a text file that is part of the Robots Exclusion Protocol (REP) and is used to tell search engine crawlers which pages or files they can or cannot request from your site.
A well-configured robots.txt can:
The most common directives are:
User-agent: Specifies which robot the rules apply toDisallow: Indicates which paths should not be crawledAllow: Indicates which paths can be crawled (overrides Disallow)Sitemap: Specifies the location of the XML sitemapCrawl-delay: Sets the delay between crawl requestsHost: Indicates the preferred domain (unofficial directive)User-agent: * to apply rules to all robotsThe robots.txt file is a text file placed in the root directory of a website that instructs web crawlers (search engine bots) which parts of the site they can and cannot access. It is part of the Robots Exclusion Protocol (REP), a standard used by websites to communicate with automated web crawlers. While it's not a security measure (determined crawlers can ignore it), it's an essential tool for SEO and server resource management. The Robots.txt Generator tool above helps you create a properly formatted robots.txt file for your website.
The Robots Exclusion Protocol was created in 1994 by Martijn Koster and other webmasters concerned about crawler traffic overwhelming their servers. The first specification was developed on the www-talk mailing list. Since then, it has become a standard used by all major search engines, including Google, Bing, Yahoo, Yandex, and Baidu. The protocol is not an official standard but is widely adopted and respected.
| Directive | Description | Example |
|---|---|---|
User-agent | Specifies which robot the following rules apply to | User-agent: * (all bots) |
Disallow | Paths that should NOT be crawled | Disallow: /admin/ |
Allow | Paths that CAN be crawled (overrides Disallow) | Allow: /public/ |
Sitemap | Location of XML sitemap(s) | Sitemap: https://site.com/sitemap.xml |
Crawl-delay | Delay between requests (seconds) | Crawl-delay: 5 |
Host | Preferred domain (unofficial, used by Yandex) | Host: www.example.com |
User-agent: * for rules that apply to all crawlers. For specific bots like Googlebot, use User-agent: Googlebot. More specific user-agent rules override general ones.User-agent: *
Allow: /
Allows all crawlers to access all content. This is the default behavior even without a robots.txt file.
User-agent: *
Disallow: /
Blocks all crawlers from accessing any part of the site. Use with caution—this will prevent search engines from indexing your site entirely.
User-agent: *
Disallow: /admin/
Disallow: /private/
Disallow: /tmp/
User-agent: BadBot
Disallow: /
User-agent: *
Allow: /
Blocks a specific bot while allowing others.
"A properly configured robots.txt file tells search engines exactly what you want them to see and what to ignore. It's not about hiding content—it's about guiding crawlers to what matters most."
— SEO best practices
A well-configured robots.txt file provides several SEO benefits:
Disallow: / is only used when you truly want to block indexing.Use specific user-agents to apply rules to individual search engines while allowing others.
Use Google Search Console's robots.txt tester to verify your configuration before deployment.
Always add the Sitemap directive to help crawlers find your content efficiently.
Crawl-delay can limit crawling too much. Use only if your server struggles with traffic.
Make sure each directive is on its own line, with no spaces before the colon.
The robots.txt file must be placed in the root directory of your website. For example:
https://example.com/robots.txthttps://www.example.com/robots.txtThe file must be accessible via HTTP and should be a plain text file. It's case-sensitive—use lowercase for filenames.
After creating your robots.txt file, test it using:
No. robots.txt prevents crawling, not indexing. If other pages link to a disallowed page, it may still be indexed. Use the noindex meta tag or X-Robots-Tag header to prevent indexing.
Yes. You can specify paths to image directories or specific file types to prevent them from appearing in image search results.
Disallow stops crawlers from accessing a page. noindex allows crawling but tells search engines not to include the page in search results. Use noindex for pages you want crawled but not indexed.
Search engines typically re-fetch robots.txt every few days. You can speed up the process using Google Search Console's "Request indexing" feature.
Not necessary, but including a sitemap directive can help search engines discover your content. An empty file is fine, but having none at all is also acceptable.
A well-configured robots.txt file is an essential part of any SEO strategy. It helps search engines crawl your site efficiently, prevents wasted crawl budget, and ensures that your most important content gets discovered. Use the Robots.txt Generator to create your file, test it with search console tools, and monitor your site's crawl performance over time.
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