Canonical Tag Issues

Shopify Discussion

Topic summary

A user wants to modify Shopify’s canonical tag behavior so that product-only URLs (e.g., /products/foam-roller-set) canonicalize to collection-aware URLs (e.g., /collections/foam-rollers/products/foam-roller-set) instead of Shopify’s default behavior.

Current Shopify behavior:

  • Collection-aware URLs automatically canonicalize to product-only URLs
  • This is Shopify’s built-in SEO configuration

Requested change:

  • Reverse this behavior to make collection-aware URLs the canonical version
  • Attempted using an app without success

Expert response strongly advises against this approach:

  • Not natively possible and would require custom theme code modifications
  • Major SEO risks: Products in multiple collections would create competing canonical URLs with identical content, causing self-competition in search rankings
  • Third-party conflicts: Advertising platforms (Google Ads, Facebook) use product-only URLs, creating inconsistencies
  • Industry trend: Modern themes are moving away from collection-aware URLs for SEO reasons
  • Implementation complexity: Removing Shopify’s default canonicalization and building custom logic leaves significant room for errors that could harm SEO

The discussion remains unresolved as the original poster has not responded to the detailed explanation of why this approach is problematic.

Summarized with AI on November 1. AI used: claude-sonnet-4-5-20250929.
1

Hi Guys

I am hoping someone can help me please, I would like to arrange my sites product and collection pages, so they canonicalise correctly for ranking purpose.

I would like my product pages to canonicalise to the collections equivelent.

e.g I would like the below page

https://website/products/foam-roller-set

to canonicalise to:

website/collections/foam-rollers/products/foam-roller-set

And the below URL to self canonicalise,

website/collections/foam-rollers/products/foam-roller-set

So Google knows that

https://website/collections/foam-rollers/products/foam-roller-set

Is the URL I want to rank, I have tried adding the canonical tag via an app, but it doesn’t work correctly.

So I assume I would have to edit the theme to do this.

Is there a way to drill into individual pages in the editor, or would it have to be a code snippet in the

Any help would be greatly appreciated.

Thanks guys, Kind regards.

2

Hey @lloydy14 ,

If I understand correctly, you want to canonicalize your product-only URLs to your collection-aware URLs?

Current:

collection-aware URL: /collections/foam-rollers/products/foam-roller-set

product-only URL: /products/foam-roller-set

canonical: /products/foam-roller-set

You want:

collection-aware URL: /collections/foam-rollers/products/foam-roller-set

canonical: /collections/foam-rollers/products/foam-roller-set

AND

product-only URL: /products/foam-roller-set

canonical: /products/foam-roller-set

Do I understand that correctly?

In short, you can’t natively nor would I recommend this approach as it could really hurt your SEO. Here are a few reasons why off the top of my head and in no particular order:

  1. Many themes are moving away from the collection-aware URL entirely because it’s not great for SEO for the reasons above.

  2. A product can belong to any number of collections, but only one product URL. So let’s say your product is in the collection for /foam-rollers and in the collection for /equipment. The only difference between these two pages is the URL. Then Google has to decide which of those exact same pages will rank because they are both the canonical. Or, Google will say you’ve chosen /foam-rollers as the canonical but you get more traffic to /exercise and they choose your /exercise as the canonical.

  3. You may then run into Google Page Index reporting issues for “Alternate page with proper canonical tag” and “Duplicate, Google chose different canonical”.

  4. The canonical to your product-only URL is to prevent duplicate content issues. If every collection-aware URL is self-canonicalized then you’d have the same content on multiple pages. You’re telling Google these are all important but the content is identical, leading you to compete with yourself.

  5. Shopify automatically canonicalizes your collection-aware URLs to product-only URLs. The canonical URL is determined by Shopify and is configured for you. Though you could change the code to remove the canonical, you’d then have to add new code and build out how you’d want it to work which leaves a lot of room for error. Doing this wrong could be detrimental to your SEO.

  6. If you wanted your product-only URL to canonicalize to your collectin-aware URL (so reverse of the default in Shopify), all the above still applies.

  7. If you use any sort of third-party advertising (Google Ads, Youtube, Facebook, etc) they all use your product-only URL and variant-specific URL if appropriate. This could cause even more confusion with Google Search let alone Google Ads and Merchant Center. Not to mention you wouldn’t be able to change the URLs for these third-party tools to your collection-aware URL.

Hopefully this helps.