🍋 SEO Tools
Canonical Tag Checker
Find and validate canonical URL tags in HTML
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About Canonical Tag Checker
Paste your HTML to find the canonical URL tag and validate it. Check for common issues like missing canonical tags, relative URLs, and mismatched protocols.
How It Works
The tool searches HTML for tags and validates the href attribute. It checks for absolute URLs, HTTPS protocol, trailing slashes, and other common issues.
Step by Step
- 1 Paste your HTML source code
- 2 Click Check to find canonical tags
- 3 Review any warnings or issues found
Tips
- Every page should have exactly one canonical tag
- Always use absolute URLs (https://example.com/page/), not relative (/page/)
- The canonical URL should match the page's preferred URL exactly
- Use canonical tags to handle duplicate content from URL parameters
Frequently Asked Questions
What is a canonical tag?
A canonical tag (rel='canonical') tells search engines which version of a page is the 'original' when duplicate or similar content exists at multiple URLs.
Should canonical tags be self-referencing?
Yes. Best practice is for every page to have a canonical tag pointing to itself, confirming it is the preferred version.