Canonical Tag Inspector - Online Check Rel=Canonical from Page Source
Paste HTML or URL to extract canonical link tag. Verify self-referencing. Simple SEO audit step. Local only.
UD5 Toolkit
Paste HTML or URL to extract canonical link tag. Verify self-referencing. Simple SEO audit step. Local only.
Enter two URLs and see if they resolve to the same canonical form after normalization. Find duplicate content issues.