Generate robots.txt from crawler rules and a sitemap URL

Add each user-agent, choose whether its path is allowed or disallowed, and provide the absolute URL of your XML sitemap. The generator validates every path, groups rules for the same crawler, uses canonical directive spelling, and returns deterministic plain text with safe line breaks. It is useful for drafting a new policy, replacing an error-prone hand-written file, or producing consistent robots.txt content inside a deployment pipeline.

Describe crawler access as explicit rules

Start by adding one row for every crawler and path decision. A user-agent identifies the crawler that should receive the instruction; use an asterisk when a rule applies to all crawlers, or supply a specific crawler token when its treatment differs. Then select Allow or Disallow and enter the relevant path pattern. Every path must begin with a forward slash, including the root path itself. This requirement catches a common robots.txt mistake before the file is published. Rules belonging to the same user-agent are collected into one group even when their rows are separated in the input, while both group order and rule order follow their first appearance. That stable ordering makes the result easy to review in a pull request and prevents needless changes between repeated builds. The generator does not decide which areas should be private or crawlable; it faithfully serializes the policy you provide, so review the paths against the actual routing structure of your site.

Understand what the generated file controls

A robots.txt file gives cooperative web crawlers instructions about which URL paths they may request. It is not an authentication system, an access-control list, or a way to conceal confidential material. A disallowed address may still be discovered through links, and clients that ignore the protocol can request it unless the server enforces separate authorization. Use application permissions, private storage, or server rules for anything that must remain protected. Within a user-agent group, specific crawlers interpret Allow and Disallow patterns according to their own documented matching behavior, especially when wildcards or end markers are involved. This tool preserves path text rather than attempting to predict a particular crawler’s precedence rules. It rejects embedded line breaks in user-agent names, directives, paths, and the sitemap value so one field cannot silently inject extra records. The result uses conventional capitalization and blank lines, creating readable syntax without adding comments or assumptions that were not present in the structured input.

Publish the result and verify it in context

Place the returned content in a plain-text file named robots.txt at the root of the relevant website origin, such as https://example.com/robots.txt. The sitemap field must be an absolute HTTP or HTTPS URL, and the generator normalizes that URL before adding a final Sitemap line. This declaration helps crawlers locate the XML sitemap even when it is hosted at a less obvious path or on another permitted host. After deployment, request the public robots.txt URL directly and confirm that the response is successful, has plain-text content, and is not replaced by an application error page, redirect loop, or login screen. Test important paths with the inspection tools supplied by the search engines and crawlers you care about, because crawler support and matching details can differ. Regenerate the file whenever routes, private sections, staging protections, or sitemap locations change. The output is deterministic for the same input, making it suitable for source control, automated builds, configuration reviews, and repeatable infrastructure deployments.