How It Works
We inspect the page HTML for canonical link tags, count duplicates, compare the canonical to the scanned URL, and flag cross-domain canonical signals.
100% freeNo API keyPublic data onlyNo store login
Free Canonical Tag Checker
Check canonical tags, duplicate URL risks, self-referencing canonicals, and ecommerce indexing signals.
Scan a public storefront URL
Get focused issues and recommendations
Run the full audit for store-wide priorities
This check is useful alone. It is stronger inside a full audit.
Combine this result with SEO, trust, speed, conversion, security, accessibility, and revenue-priority checks.
Run full ecommerce auditWhy It Matters
Canonical tags help search engines choose the preferred URL when ecommerce stores create variants, filters, tracking parameters, collection paths, and duplicate product URLs.
What We Check
Canonical presence, canonical count, self-referencing status, cross-domain targets, and duplicate canonical risk.
Best Practice
Use one canonical per page, point product and collection pages to clean preferred URLs, and avoid conflicting SEO app or theme-generated canonical tags.
When ecommerce teams usually run this check
Merchants usually use Canonical Tag Checker before a launch, redesign, SEO sprint, conversion optimization cycle, or competitor review. It is useful when you need a focused answer fast without running a full audit first.
This is also a good pre-check before sending more paid traffic to a page. If the result exposes weak fundamentals, it is often cheaper to fix them before spending harder on acquisition.
Common mistakes this tool can help surface
A lot of stores lose performance because teams check only the homepage, optimize the wrong template, or fix cosmetic issues before structural ones. Focus first on the pages that matter for discovery, trust, and conversion.
- Reviewing one URL and assuming the whole store behaves the same way
- Treating the score as the goal instead of using it to prioritize fixes
- Ignoring mobile, product-page, or legal-page context when it matters to buyers
Try more free tools
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Find Out What's Costing You Sales
A complete audit of your store's trust, SEO, speed, conversion, and security โ with prioritized fixes ranked by revenue impact.
Want a full breakdown of your store revenue leaks?
The tools above are just the start. Our full audit analyzes 8 dimensions, gives you a prioritized fix list with revenue estimates, and a certification badge.