Inspect HTML canonical tags, HTTP Link headers, self-canonical signals, cross-domain targets, and conflicting canonical rules before duplicate pages steal ranking equity.
Run the tool to see analysis, exports, and next actions here.
The tool fetches a page and compares its canonical signals across HTML and HTTP headers. It helps you decide whether search engines are being pointed to the correct version of the content.
Run a canonical check when rankings split across URL variants, a migration changes paths, faceted URLs appear in search, or a page is indexed even though another URL should be preferred.
A self-canonical page is usually healthy when it is the preferred ranking URL. A page canonicalized elsewhere can be correct for duplicates, but dangerous when the target is weaker, blocked, or unrelated.
Canonical mistakes are expensive because they rarely look like a broken page. Users can still visit the URL while search engines consolidate signals somewhere else.
If one URL is risky, check adjacent templates. Canonical problems often repeat across collections, variants, locales, and generated landing pages rather than staying isolated to one page.
Quick answers for crawl planning, metadata QA, and SEO handoffs.
A canonical URL is the preferred version of a page that search engines should consolidate duplicate or near-duplicate signals toward.
It is usually good when the page is the preferred ranking URL. It is not good when the page is a duplicate that should consolidate to another canonical page.
They help consolidate signals, but they do not replace clean architecture, consistent internal links, redirects, and indexability controls.
Some files and non-HTML resources use HTTP Link headers for canonical signals. Conflicts between headers and HTML can create search ambiguity.