How to fix seo facet url not canonicalized on Webflow
Add a canonical tag pointing filtered and sorted category URLs back to the clean (unfiltered) category page URL to prevent duplicate content and crawl waste.
Steps for Webflow
- Webflow Commerce does not generate classic faceted navigation filter URLs out of the box, so this is most relevant if you have implemented custom filtering via query parameters using JavaScript.
- For Collection pages with query-parameter-based filters: open your Webflow project → go to the Collection page template in the Designer → open Page Settings (gear icon) → SEO tab. Webflow outputs a self-referencing canonical automatically for Collection pages.
- To canonicalize filtered variants (URLs with `?` query parameters) back to the clean Collection page, add a Custom Code snippet in the Page Settings → Custom Code → `<head>` section: `<script>if(window.location.search){var l=document.createElement('link');l.rel='canonical';l.href=window.location.origin+window.location.pathname;document.head.appendChild(l);}</script>`
- Publish the site and verify by inspecting the page source on a filtered URL.
<link rel="canonical" href="https://www.example.com/category-page/" />What is seo facet url not canonicalized?
When shoppers filter or sort your product listings — for example, by size, color, price, or usage — your store generates new URLs with query parameters or path segments (e.g., `/apparel/?color=red&size=M`). These filtered pages show essentially the same category with a narrowed-down product set. A canonical tag is a small snippet of HTML code placed in the `<head>` of a page that tells Google: "This page is a variation — the *real*, authoritative version is over here." Without it, Google sees dozens or hundreds of near-duplicate pages and has to figure out on its own which one to rank.
Every filtered or sorted URL that lacks a canonical tag is a potential duplicate page in Google's index. This splits your ranking signals (links, authority) across many weak versions instead of concentrating them on one strong category page. Google's crawl budget — the number of pages it will crawl on your site in a given period — gets burned on hundreds of low-value filter combinations instead of your important product and category pages, meaning new products and pages may be discovered and indexed more slowly. In competitive niches, consolidated ranking signals can be the difference between page 1 and page 2. Fixing this is one of the highest-leverage technical SEO changes a store with faceted navigation can make.
See the complete Seo facet url not canonicalized guide for every platform and the full background.
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