Free Canonical Tag Checker — Validate rel=canonical
Canonical Tag Checker
A canonical tag checker inspects a page's <head> for the rel="canonical" link element and flags the errors that stop it from working: missing canonicals, relative rather than absolute URLs, multiple conflicting canonical tags, a canonical pointing cross-domain when it shouldn't, and a canonical that contradicts a noindex directive on the same page. Google treats canonical as a strong hint rather than a directive, so a broken one is often the reason the wrong URL version ranks. Paste a URL or raw HTML below to run the check.
Paste a URL or page HTML to check its canonical tag for missing, relative, multiple or conflicting rel=canonical issues. Free, instant, no signup.
Free Canonical Tag Checker — Validate rel=canonical is part of LemRank, the rank intelligence platform for SEO agencies and in-house teams: daily rank tracking, SERP change detection, AI Overview and LLM visibility, competitor gap analysis, site audits and white-label client reporting.