Browse by topic

Canonical tag topics

The full CanonicalTag.com reference, grouped into the four areas where canonical questions come up.

The canonical tag touches everything from a single line of HTML to sitewide duplicate-content strategy. Browsing by topic groups the whole reference the way the work actually breaks down: the statuses you read in Search Console, the edge cases that trip up audits, the CMS platforms you manage, and the JavaScript frameworks you build on.

Google Search Console Statuses

5 pages

The canonical states you see in the GSC Page indexing report, what each one means, and how to respond.

Search Console

Duplicate Without User-Selected Canonical

The Search Console status that appears when Google finds a duplicate page but you haven't declared a canonical, so Google chooses one for you.

Search Console

Alternate Page With Proper Canonical Tag

The reassuring Search Console status: your page correctly points to another canonical, and Google is consolidating it exactly as intended.

Search Console

Duplicate, Google Chose Different Canonical Than User

You declared a canonical, but Google overrode it and selected a different URL, the clearest proof that rel=canonical is a hint and not a directive.

Search Console

Duplicate, Submitted URL Not Selected as Canonical

A URL you submitted in your sitemap was not chosen as canonical because Google treats it as a duplicate of another page.

Search Console

User-Declared vs Google-Selected Canonical

The two labels in Search Console's URL Inspection tool: the canonical you declared, and the one Google actually chose to index.

Conflicts & Edge Cases

6 pages

How the canonical tag interacts with noindex, pagination, hreflang, redirects, and other signals.

Edge Case

Best practice

Self-Referencing Canonical Tags

A canonical tag that points a page at its own URL, the recommended baseline that removes ambiguity from parameter and variant URLs.

Edge Case

Conflicting directives

Canonical Tag and Noindex Together

Combining rel=canonical and a noindex tag on the same page sends Google contradictory instructions. Why to avoid it and what to do instead.

Edge Case

Paginated series

Canonical Tags and Pagination

How to canonicalize a paginated series correctly, with each page self-referencing, and why canonicalizing everything to page one backfires.

Edge Case

Syndication

Cross-Domain Canonical Tags

Pointing a canonical to a URL on another domain, the content-syndication technique Google now de-emphasizes in favor of noindex.

Edge Case

Configuration error

Multiple and Conflicting Canonical Tags

When a page outputs more than one rel=canonical, Google may ignore them all. How duplicate tags happen and how to resolve them.

Edge Case

Invalid target

Canonical Pointing to a Redirect, 404, or Noindexed Page

A canonical only works if its target is a clean, indexable 200 URL. Pointing at redirects, errors, or noindexed pages wastes the signal.

CMS & Website Platforms

11 pages

Setting and controlling the canonical tag in the major content management systems, site builders, and SEO plugins.

CMS Platform

WordPress

Canonical Tags in WordPress

How WordPress core handles canonicals on singular content, what it leaves out, and how to add or override them with or without a plugin.

CMS Platform

WordPress plugin

Canonical URLs in Yoast SEO

How Yoast SEO adds self-referencing canonicals across your whole WordPress site, where to override them, and how to fix a wrong canonical.

CMS Platform

Wix

Canonical Tags in Wix

How Wix sets a default canonical for every page, how to override it, and the sitemap side effect you need to watch for.

CMS Platform

Squarespace

Canonical Tags in Squarespace

Squarespace auto-manages a self-referencing canonical you cannot natively edit, and injected canonicals can create duplicates if you are not careful.

CMS Platform

Webflow

Canonical Tags in Webflow

Unlike most platforms, Webflow does not add a canonical by default. How to set the global and per-page canonical, and the CMS limitation to know.

CMS Platform

WordPress plugin

Canonical URLs in Rank Math

How Rank Math sets self-referencing canonicals across WordPress, where to override them, and the filter for programmatic control.

CMS Platform

WordPress plugin

Canonical URLs in All in One SEO

How All in One SEO (AIOSEO) supplements WordPress core with self-referencing canonicals, and where to override them.

CMS Platform

Drupal

Canonical Tags in Drupal

Drupal core adds self-referencing canonicals on entity pages; the Metatag module controls and overrides them.

CMS Platform

Joomla

Canonical Tags in Joomla

Joomla's built-in canonical support is weak by design; SEF and non-SEF URLs create duplicates that an extension resolves.

CMS Platform

Ghost

Canonical Tags in Ghost

Ghost adds self-referencing canonicals automatically and offers a per-post Canonical URL field for republished content.

CMS Platform

HubSpot

Canonical Tags in HubSpot CMS

HubSpot generates self-referencing canonicals by default, with a page-level override and domain-level canonicalization.

Ecommerce Platforms

4 pages

Canonical tags on hosted and self-hosted ecommerce platforms, where product and category URLs multiply.

Ecommerce

Shopify

Canonical Tags in Shopify

How Shopify auto-generates canonicals, the collection-versus-product URL behavior, and how to customize the tag in theme.liquid.

Ecommerce

Magento

Canonical Tags in Magento (Adobe Commerce)

How to switch on canonical tags for Magento products and categories, and why the built-in setting does not fix layered navigation.

Ecommerce

WordPress ecommerce

Canonical Tags in WooCommerce

WooCommerce adds no canonical layer of its own; it relies on WordPress and your SEO plugin. The real work is taming filter, sort, and pagination URLs.

Ecommerce

BigCommerce

Canonical Tags in BigCommerce

BigCommerce adds self-referencing canonicals automatically and folds a product's multiple category URLs to one canonical product URL.

JavaScript Frameworks

2 pages

Implementing canonical tags reliably in Next.js, React, and other JavaScript frameworks.

Framework

Next.js

Canonical Tags in Next.js

Setting canonicals in Next.js with the App Router Metadata API, the Pages Router, next-seo, and the metadataBase gotcha to avoid.

Framework

React

Canonical Tags in React

Adding canonical tags to a React app with react-helmet-async, and why a client-only canonical is risky without server-side rendering.