Can this tool check a live URL?
No. Paste the HTML source manually. The checker does not fetch or crawl websites.
SEO
Canonical Tag Checker
Analyze pasted HTML for canonical link tags and check missing, duplicate, relative, empty or unusual canonical URLs directly in your browser.
Tool
Canonical Tag Checker
Analyze pasted HTML for canonical link tags and check missing, duplicate, relative, empty or unusual canonical URLs directly in your browser.
This tool runs in your browser. Your input is processed locally and is not uploaded.
About this Tool
Paste an HTML head section or full page source to inspect canonical tags. The checker reports missing tags, duplicate canonical tags, empty href values, relative URLs, fragments and query strings that may need review.
Examples
- Paste a page head section
- <link rel="canonical" href="https://example.com/page/">
- Check duplicated canonical tags
Frequently Asked Questions
Can a page have multiple canonical tags?
It should not. Multiple canonical tags can send confusing signals, so the checker warns when more than one is found.
Are relative canonical URLs okay?
They may work in some cases, but absolute canonical URLs are usually clearer and less error-prone.