Robots.txt File Validator
Paste or upload a robots.txt file to check syntax, directives, sitemap references, and crawler rule issues.
Input
Paste or upload robots.txt
Validate directives, paths, sitemap URLs, and common crawler rule mistakes.
Your data stays private
Validation runs in your browser. Nothing is uploaded or stored.
What does a robots.txt validator do?
A robots.txt validator checks your robots.txt file for syntax errors, invalid directives, malformed sitemap URLs, and crawler rule problems.
It helps identify issues that could accidentally block search engines from crawling important parts of your website.
In simple terms:
Validate your robots.txt file before publishing it to avoid crawl mistakes.
How to use this tool
- Paste or upload your robots.txt file.
- Run the validation check instantly.
- Review syntax errors, warnings, and detected directives.
- Check sitemap URLs and crawler groups.
- Fix issues before deploying the file to production.
Validation best practices
- Review broad blocking rules carefully.
- Use full HTTPS URLs for sitemap directives.
- Check for typos in directives and user agents.
- Avoid accidentally blocking CSS or JavaScript files.
- Retest the file after major website changes.
Example validation issue
This rule would block all crawlers from accessing your entire site:
User-agent: *
Disallow: /Validators help catch accidental crawl blocks, malformed rules, unsupported directives, and sitemap formatting issues before deployment.