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Index & Discovery

Canonical URL Check

Find missing, conflicting or cross-domain canonical signals.

Free · instant

Run a deterministic technical check

The result comes from HTTP requests, parsers and maintained rules — no AI guessing, so it is reproducible.

A specific public page, e.g. https://yourbrand.com/guides/one

Requests are rate-limited and cached. Only public content is fetched.

01

What does this tool check?

We read every rel=canonical on the page and compare it against the final URL after redirects: is it self-referencing, relative, pointing at another domain, or are there several disagreeing tags?

02

How should I read the result?

A canonical pointing elsewhere tells crawlers "index that page instead of me" — sometimes intended (syndication), often an accident from a template. Multiple conflicting canonicals are always a bug.

03

What should I do next?

Each indexable page should carry exactly one absolute, self-referencing canonical.

Sources: Google canonical 文档

InsightWonder

This checked one page

InsightWonder scans the whole site, ranks what to fix by impact, and keeps watching so a template change does not silently de-index a section.

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  • Scheduled re-checks with change alerts
  • Visibility and citations across five AI engines
  • Fixes ranked by impact, with content generated
Canonical URL Checker — Find Conflicting canonical Tags