SEO Release Diff
Catch metadata changes before a release goes live.
Paste HTML only, up to 1 MiB (UTF-8) per snapshot. Inputs stay in this browser; pasted scripts and resources are not loaded.
HTML snapshots exclude response headers, HTTP status, robots.txt and live indexing. Review notes follow Google’s robots meta guidance and canonical guidance.
Moving page URLs too? Check your redirect map for chains and loops.
About SEO Release Diff
Compare two saved HTML snapshots to review the metadata that changed between releases. This tool reads titles, descriptions, canonicals, robots and googlebot meta directives, hreflang pairs, Open Graph metadata and JSON-LD type names. Processing happens locally in your browser. It does not crawl URLs, execute scripts, predict rankings or check live indexing.
Frequently Asked Questions
Copy the page source before and after your change, or use saved build output. You may also paste copied rendered HTML, but this tool itself does not run page scripts. Use comparable snapshots from the same page.
No. The browser may recover malformed HTML. JSON-LD is checked for valid JSON and summarized by @type; schema requirements, rich result eligibility and other JSON-LD properties are not compared. Nested template content is excluded.
No. HTTP status, X-Robots-Tag and other response headers, robots.txt, JavaScript behavior, canonical selection and live indexing are outside this check. Compare those separately.
Decoded text and attribute values are compared exactly, including case and whitespace. Tag order is ignored and duplicates are retained. JSON-LD compares unique type names only. Relative URLs remain as pasted.