Free tool · SEO
Canonical Tag Checker
Paste your HTML — or give us a URL and we fetch it — and find the canonical problems that silently drop the tag.
Paste mode is offline: nothing is uploaded and nothing is fetched. Either way this reads source, not the rendered DOM — a canonical written by JavaScript after load is in neither, so "none found" means "none in this text".
Paste some HTML on the left and the findings appear here.
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