← Tools

Free browser tool

Check the SEO signals already in your HTML.

View a page’s source, paste it below, and review core metadata, heading structure, image alternatives, and JSON-LD. This tool does not fetch URLs or send your HTML to a server.

This is a focused on-page checklist, not a ranking score or a substitute for crawl, performance, accessibility, or content review.

How to use the HTML SEO checker

  1. Open the public page and view its complete HTML source.
  2. Paste the source above and run the checker.
  3. Review warnings in the context of the page’s purpose rather than treating them as an automatic score.
  4. Confirm the finished public URL can be crawled and indexed after any change.

Title and description length checks are approximate writing prompts. Search engines can display different snippets, and valid structured data does not guarantee a rich result.