Canonical Issues and How to Fix Them? 

A Canonical issue is a common problem that arises during a technical audit or SEO evaluation. This problem causes search engines to have trouble determining which webpage should be displayed. When this occurs, users will often wonder how to fix the problem. Here’s what you need to know.

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Canonicalization is a process that transforms data from more than one representation into a single, standardized form. This process is used in the creation of XML documents and other data repositories. Data may be represented in multiple ways, ranging from the usual to the canonical. Canonicalized data is preferred for scientific publications, Web sites, and more. 

Canonicalization works in several contexts, including email sender addresses, filename construction, Unicode encoding, XML, and URL construction. While multiple paths may refer to the same resource, canonicalization provides a mechanism to determine which path refers to which one. 

301 redirect 

A 301 redirect is a great way to ensure that only one version of a web page is indexed, but it’s not always possible. Some web developers may not be tech-savvy, or CMSs may not have the capability to create a 301 redirect. In such cases, you can use the rel=canonical attribute instead, which is simpler to implement and requires no changes to your web server. Google announced support for cross-domain use of the canonical tag in late 2009, so be sure to include it in your content. 

Canonical issues can lead to several problems, including duplicate content and diluted link equity from backlinks. You should learn how to fix these issues and implement best practices for canonical tags and 301 redirects on your web pages. 


When you encounter a Noindex as a canonical issue on your site, there are a few possible solutions. First, you can set the canonical URL to a different URL. Another solution is to remove robot directives from your site. These directives confuse search engines and weaken your signal. 

To determine if you’re using a canonical URL, you’ll need to check the HTML source code for the index tag. You can also use the Inspect option on Chrome to look at the HTTP headers. A good index tool will also show you the recognized directives on a page. If you’re not sure what directives are present on a page, you can also use Google Search Console’s URL Inspection tool. 


Google and other search engines are becoming more concerned about security, so it’s important to ensure your site uses HTTPS protocol. It’s also a good idea to use the lowercase version of your URL for canonical tags, as uppercase and lowercase versions of your URL are treated differently by search engines. If you use both, you’ll likely have issues with indexing. 

To make sure your pages are fully robotized, make sure you use an HTTPS version of the page. Otherwise, you’ll get errors and potential trust issues from Google. You should also avoid using malformed URLs, as Google doesn’t like to use them. Also, using absolute paths is safer than relative ones. When you use HTTPS, Google will automatically favor the HTTPS version of your site for canonical URLs. 

Duplicate content 

If you are a webmaster, you are probably familiar with the term “duplicate content”. This means that two or more of your pages contain content that is identical, or nearly so. The problem is that duplicate content confuses visitors. It’s extremely confusing for visitors to click on a page, only to find a different page with the same content. 

Duplicate content can be an issue for search engines because it sends conflicting signals to search engines. Instead of using the same content on two different pages, use unique URLs for each one. This can help you improve your SEO performance.