Overview
Introduction
Robots.txt syntax is simple, but the plain-text format has no built-in validation, so a typo in a directive name, a missing colon, or rules attached to the wrong User-agent group can silently produce a file that doesn't do what you intended.
This tool builds the file structurally instead: you add User-agent groups and their Allow/Disallow rules through a form, and it assembles correctly formatted robots.txt text you can copy or download directly.
What Is Robots.txt Generator?
A form-based robots.txt builder that turns one or more User-agent groups, each with Allow/Disallow paths, plus an optional list of Sitemap URLs, into valid robots.txt text.
It includes one-click presets for the three most common starting points: allowing all crawlers everywhere, disallowing all crawlers everywhere (useful for staging sites), and typical WordPress defaults that block /wp-admin/ while allowing the one file most themes need from it.
How Robots.txt Generator Works
Each rule group becomes a "User-agent:" line followed by its Allow/Disallow directives in the order you added them; groups are separated by a blank line, matching the format crawlers expect. Any sitemap URLs you list are appended as "Sitemap:" lines at the end.
Empty paths and empty user-agents are skipped automatically, so partially filled-in rows don't produce malformed output.
When To Use Robots.txt Generator
Setting up robots.txt for a new site and wanting a correctly formatted starting point instead of writing the syntax by hand.
Quickly generating a "disallow everything" file for a staging or pre-launch environment, then swapping it for a real one before going live.
Often used alongside Robots.txt Tester and XML Sitemap Generator.
Features
Advantages
- Produces correctly formatted output by construction, with no risk of a missing colon or misplaced directive breaking parsing.
- One-click presets cover the most common starting configurations without needing to remember exact syntax.
- Supports multiple User-agent groups with independent rule sets, for sites that need different crawling permissions per bot.
Limitations
- This generates the file structurally but doesn't verify the rules actually match the paths you intend - use the robots-txt-tester tool afterward to check specific paths against the output.
- It doesn't fetch or diff against your site's existing robots.txt, so replacing a live file requires manually confirming you're not losing rules you meant to keep.
Examples
Best Practices & Notes
Best Practices
- Always include a wildcard (User-agent: *) group as a fallback, since a crawler that finds no matching group and no wildcard group defaults to crawling everything.
- List your sitemap URL in robots.txt even if you've also submitted it directly to Search Console, since some crawlers discover sitemaps this way first.
- Double-check a "disallow everything" file gets replaced before a staging site goes live; forgetting to swap it out is one of the most common causes of a site vanishing from search results after launch.
Developer Notes
Output always ends with a trailing newline and blank-line-separated groups, matching the format most robots.txt parsers (and the RFC 9309 examples) expect; paths and user-agents are trimmed of surrounding whitespace before being written.
Robots.txt Generator Use Cases
- Generating a starting robots.txt for a newly launched site without hand-writing the syntax
- Building a per-bot crawling policy that treats an image crawler differently from the general wildcard group
- Producing a quick "disallow everything" file to keep a staging environment out of search engines
Common Mistakes
- Forgetting a wildcard (*) group entirely, which means any crawler not explicitly named gets no restrictions at all.
- Adding rules meant for one bot to the wrong group after copy-pasting an existing file, since robots.txt has no validation to catch a rule attached under the wrong User-agent line.
Tips
- Use the "Disallow all" preset as a safety default while a site is still in development, then switch to real rules before launch.
- After generating, paste the output into the robots-txt-tester tool and check a few specific paths to confirm the rules do what you expect.