Canonical Consistency Checker

Why variants matter

When http://, https://www., trailing-slash, and ?utm_source= versions of a page all resolve differently — or all return 200 — search engines see several competing URLs where you see one page. That splits link equity, wastes crawl budget, and produces the “Duplicate without user-selected canonical” rows in Search Console that nobody enjoys diagnosing.

What it checks

• Eight variants of your URL: as given, the other scheme, www toggled, trailing slash toggled, an uppercased path, and a tracking-parameter version
• The full redirect chain for each variant — including whether consolidation happens in one hop (good) or a chain (each hop leaks signals and slows crawling)
• rel=canonical in the HTML and the Link: rel=canonical HTTP header — the header variant is routinely misconfigured by CDNs and plugins, and when tag and header disagree, Google gets to pick
• Whether the query-parameter variant correctly stays a 200 with a self-referencing clean canonical (redirecting it would break campaign tracking)

What you get

A single verdict — consistent, mostly consistent, or fragmented — plus a per-variant breakdown showing exactly which version misbehaves and the conventional fix for each issue.