Canonical Checker

Analyze canonical tags, validate URLs, and check for duplicate content issues. Free online tool.

Enter URL here or click to paste

About this tool

Canonical Checker is a free online tool for analyzing and validating canonical tags on your website. Canonical tags tell search engines which version of a page is the primary one, preventing duplicate content penalties. This tool helps you identify canonical tag issues, validate their URLs, and ensure proper SEO implementation. Perfect for SEO professionals, developers, and webmasters managing multi-version pages or preventing duplicate content problems.

How to use

1Enter the URL of the page you want to analyze
2Click "Analyze" and wait for the analysis to complete
3View the canonical tag if present, or see if it's missing
4Check if canonical is absolute, self-referential, and returns HTTP 200
5Get recommendations for fixing canonical tag issues

Specifications and limits

Checks: canonical tag presence and validity, absolute vs relative URLs, HTTP status of canonical URL, self-referential canonicals, multiple canonical tags, redirect chains. Validates canonical URL accessibility. Processing speed: instant.