Canonical Tag Checker for Next.js
Paste your Next.js page HTML and verify the metadata alternates.canonical output.
Next.js metadata generates the canonical from alternates.canonical; verify it renders as expected.
Paste your page HTML (View source → copy).
Run this tool
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Canonical Check for Next.js tips
- Set alternates.canonical in each route's metadata
- Use a single canonical per page
- Ensure it uses the production domain
- Watch out for trailingSlash mismatches.
How to use Canonical Check for Next.js
- Paste your page HTML.
- Review the extracted SEO tags.
- Fix any missing or mismatched canonical.
Frequently asked questions
Why canonical matters?
It tells search engines which URL is the preferred version, preventing duplicate-content issues.
Should it be absolute?
Yes, canonicals should be full absolute URLs.
Is it free?
Yes, free with no signup.
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