Validate canonical tags and URLs to prevent duplicate content issues
Input the webpage URL you want to check. The tool fetches the page and analyzes its canonical tag implementation.
The tool checks for canonical tags in HTML and HTTP headers, validates URL format, and verifies best practices.
Get detailed validation results with issues, warnings, and actionable recommendations to fix canonical tag problems.
Checks HTML canonical tags, HTTP Link headers, URL format, self-referencing status, and multiple tag detection.
Validates against SEO best practices including absolute URLs, self-referencing tags, and protocol consistency.
Get specific recommendations to fix issues and implement canonical tags correctly for better SEO.
A canonical tag is an HTML element that tells search engines which version of a URL is the master copy. It prevents duplicate content issues when the same or very similar content appears on multiple URLs.
A self-referencing canonical tag points to the current page itself. This is considered best practice as it explicitly tells search engines that this is the preferred version of the page, even if no duplicates exist.
Canonical URLs should always be absolute (include the protocol and domain, like https://example.com/page). Relative URLs may cause confusion and are not recommended by Google.
Multiple canonical tags on the same page can confuse search engines. They may ignore all canonical tags or pick one arbitrarily. Always use only one canonical tag per page.
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