Canonical Version Guard
My Canonical Version Guard checks all eight URL variations of your domain simultaneously - testing every combination of protocol (HTTP/HTTPS), subdomain (www/non-www), and trailing slash - to verify that they all resolve correctly to a single canonical version. Duplicate URL variations that resolve independently rather than redirecting split your search equity and create indexation confusion. This tool maps the full redirect chain for each variation and checks that your canonical tags are consistent.
Frequently Asked Questions
Search engines treat HTTP and HTTPS, www and non-www, and trailing slash and non-trailing slash versions as potentially distinct pages. That gives eight possible combinations of any URL. Each variation that resolves independently rather than redirecting to a single canonical version creates a separate indexable URL, splitting your ranking signals.
Non-canonical variations should redirect to the canonical destination with a permanent 301 or 308 redirect. A temporary 302 or 307 redirect does not pass ranking signals cleanly to the destination, so search engines continue to treat the redirecting URL as a separate indexable page.
If a URL variation returns a 200 OK response rather than redirecting, it must include a canonical tag pointing to the correct primary version. Without this, search engines have no instruction about which version to index and may choose the wrong one, or index both simultaneously.