Robots.txt Tester
Analyze and verify your site's robots.txt file. Check syntax, directives, sitemap and test whether specific URLs are blocked or accessible to crawlers.
Enter the domain to analyze
What is a Robots.txt Tester?
A robots.txt tester is a tool that analyzes your website's robots.txt file and verifies that directives are correct, syntax is valid and there are no rules accidentally blocking crawler access. The robots.txt file is the first point of contact between Googlebot and your site: errors in this file can prevent important pages from being indexed or waste crawl budget on irrelevant resources.
Google uses the robots.txt to determine which sections of the site to crawl. A misconfigured file can have severe consequences: blocking the entire site from crawlers, preventing the reading of CSS and JavaScript needed for rendering, or failing to communicate the XML sitemap location.
Our tool automatically fetches the robots.txt file from your domain, analyzes every line, identifies syntax issues, verifies best practices and lets you test whether specific URLs are blocked or accessible for each user-agent.
Why robots.txt matters for SEO
An optimized robots.txt is essential for managing crawl budget and guiding search engines.
Crawl budget management
Tell crawlers which pages to scan, avoiding wasting resources on filters, duplicate pages or restricted areas of the site.
Sitemap communication
The Sitemap directive in robots.txt signals the location of the XML sitemap, helping search engines discover all pages.
Restricted area protection
Prevent crawling of admin panels, staging pages, internal API endpoints and content not intended for indexing.
Performance optimization
By reducing crawler requests on unnecessary resources, you lighten server load and improve response times.
Focus on important content
By guiding crawlers to key pages, you increase the chances that your best content gets crawled and indexed quickly.
Duplicate content prevention
Block crawling of parameterized versions, internal search pages and filters that generate useless duplicate content.
Robots.txt Best Practices
Follow these guidelines to optimally configure your site's robots.txt file.
✅ Do
- →Always include a User-agent: * section as a base rule
- →Add the Sitemap directive with an absolute URL
- →Block admin areas, staging and internal API endpoints
- →Test changes before publishing them to production
- →Keep the file under 500 KB in size
- →Use Allow for specific exceptions within blocked areas
❌ Don't
- →Block the entire site with Disallow: / without reason
- →Use robots.txt to hide sensitive data (it's not secure)
- →Block CSS and JavaScript files needed for rendering
- →Use relative URLs in the Sitemap directive
- →Have an enormous robots.txt file with thousands of rules
- →Forget to update rules after site restructuring
How our Robots.txt Tester works
Three steps to get a complete analysis of your robots.txt, no registration required.
Enter the domain of the site to analyze
Type or paste the domain in the field above. The tool automatically fetches the robots.txt file from the site root by appending /robots.txt to the provided URL.
The tool analyzes syntax, directives and rules
The tool parses every line of the robots.txt, identifies directives (User-agent, Disallow, Allow, Sitemap, Crawl-delay), verifies syntax and detects any issues.
Get your score, issues and test your URLs
Get a score from 0 to 100, a list of issues sorted by severity, the complete list of directives and a tool to test whether specific paths are blocked or accessible.
Robots.txt Frequently Asked Questions
Everything you need to know about the robots.txt file and crawler management.
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