Language / region variants
x-default (optional)
This exact block — including the entry pointing back to itself — must be placed on every URL listed below. That's what makes it self-referencing and fully reciprocal: one identical annotation set, present on every language/region variant.
Output
Paste existing hreflang
Check result
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Findings
hreflang tells Google which language/region version to show — it's a signal, not a directive, and it won't fix thin or duplicate content. Cross-links: Canonical Checker · Sitemap Validator. Everything above runs locally. Tool provided free by ThrillSEO.