Canonical URLs in ASP.NET Core MVC | SEO Best Practices for Developers

Published 16/04/2026

Description

Learn how to implement canonical URLs correctly in ASP.NET Core and ASP.NET Core MVC so search engines can better understand which version of a page should be treated as the preferred URL. Google says rel="canonical" link annotations are a strong signal for canonicalization, while redirects are an even stronger signal. In this video, I explain what canonical URLs are, when they matter, and how to generate them dynamically in a .NET application instead of hardcoding them page by page. Google’s canonicalization guidance explains that canonicals are mainly used for duplicate or very similar pages and that Google combines multiple signals when choosing the canonical URL. 0:00 - Introduction 0:11 - Description 2:44 - Simple Canonicals 7:01 - Modelized Canonicals 14:19 - Conclusion What you’ll learn: What canonical URLs are and why they matter. Google says canonicalization helps indicate which URL should represent a set of duplicate or near-duplicate pages in Search. How Google treats canonical hints. Google describes rel="canonical" as a strong signal, but not the only one it uses when selecting a canonical URL. Why implementation details matter. Google recommends using absolute URLs in canonical links and warns that relative paths can cause long-term problems. How to avoid common mistakes. Google says rel="canonical" annotations combined with attributes like hreflang, lang, media, or type are not used for canonicalization. How to add canonical links dynamically in ASP.NET Core MVC. A model-driven approach maps well to Google’s recommendation that each page should emit a single clear canonical signal rather than conflicting ones. This video is especially useful if you manage duplicate URLs, filtered content, multilingual structures, or syndicated pages and want a cleaner canonical strategy in code. Google also says sitemap inclusion is only a weak canonicalization signal, so relying on the canonical link element and redirects is usually more