Canonical & Hreflang Checker

A `<link rel="canonical">` tag in the HTML head that tells search engines which URL is the "master" version of a page. Essential when the same content can appear at multiple URLs.

Yes. The canonical on /foo should point to /foo (or its final URL after redirects). Missing self-references are a common source of duplicate-content flags.

A `<link rel="alternate" hreflang="...">` tag that lists language/region variants of a page. Googlebot uses it to pick the right version for each user.

If page A lists page B as its Spanish alternate, page B must list page A as its English alternate. Missing reciprocity breaks hreflang entirely.

`hreflang="x-default"` marks the fallback URL for languages not otherwise specified. Recommended for any site with hreflang tags.