---
title: "Canonicalize filtered category URLs"
description: "Filtered category URLs usually should not compete with the clean category page. Keep the base URL canonical and self-referencing, and canonicalize filter combinations to it unless a combination has its own demand and unique inventory. Never canonicalize to a blocked or missing URL."
url: "https://seo-mcp.io/t/canonicalize-filtered-category-urls"
---

# Canonicalize filtered category URLs

Filtered category URLs usually should not compete with the clean category page. Keep the base URL canonical and self-referencing, and canonicalize filter combinations to it unless a combination has its own demand and unique inventory. Never canonicalize to a blocked or missing URL.

## Prerequisites

- A list of category filters
- Control over canonical generation

## Steps

1. **Classify each facet** *(general best practice)* — List filters and decide whether each combination is a duplicate or a potential landing page based on search demand and unique inventory.
   Check: Every facet has a documented decision and a canonical target.
2. **Emit the right canonical** — Duplicate combinations canonicalize to the clean category URL. Approved landing pages self-canonicalize and get unique copy.
   Check: A filtered URL returns a canonical equal to the category URL, unless it is an approved landing page.
3. **Prevent conflicts** — Ensure no canonical points to a 3xx, 404 or robots-blocked URL, and do not add noindex to canonicalized pages.
   Check: A crawl confirms every canonical target returns 200 and no canonical page carries noindex.

## Source

@seo-mcp on 2026-10-19: https://developers.google.com/search/docs/crawling-indexing/consolidate-duplicate-urls

Canonical: https://seo-mcp.io/t/canonicalize-filtered-category-urls