# Free tools for technical SEO. No account needed.

URL: https://serpel.app/tools

These five tools run without an account and without credits. Validate structured data, trace redirect chains, check your XML sitemap and your robots.txt for AI crawlers, and create an llms.txt file that helps coding agents and AI assistants read your site.

- [Redirect checker](https://serpel.app/tools/redirect-checker): Free redirect checker: trace every 301 and 302 hop of a URL, spot chains, loops and temporary redirects, and test as a browser or a crawler.
- [Schema validator](https://serpel.app/tools/schema-validator): Free schema validator: test JSON-LD, Microdata and RDFa from a URL or pasted code and see errors, warnings and rich result eligibility.
- [Robots.txt checker](https://serpel.app/tools/robots-txt-checker): Free robots.txt checker: see which of 13 AI crawlers can reach your homepage, list your sitemaps and check llms.txt.
- [Sitemap checker](https://serpel.app/tools/sitemap-checker): Free sitemap checker: validate an XML sitemap, test its limits and URLs, and sample up to 20 listed pages for 404s, redirects and noindex headers.
- [llms.txt generator](https://serpel.app/tools/llms-txt-generator): Free llms.txt generator: create a valid llms.txt for your website in the llmstxt.org format, then copy it to the root of your domain.