The Hreflang Checker validates international targeting on multi-language and multi-region sites. It catches the errors that quietly bleed organic traffic: missing return tags, invalid language codes, x-default omissions, conflicts between sitemap and HTML declarations, and canonical/hreflang collisions. Hreflang errors are subtle — they don't 404 — but they push Google to serve the wrong language to the wrong country. This index covers every fix.
Hreflang errors fall into these categories. Pick the one matching your finding:
en, fr) and ISO 3166-1 alpha-2 for region (GB, US). Common mistakes: en-UK (should be en-GB), cn (should be zh-CN), br as language code.x-default tells Google which page to serve to users who don't match any of your language/region targets. Without it, Google guesses. The pattern: point x-default at your language-picker landing page or your English-international version.noindex in meta. Google cannot honour the annotation. Audit, fix the block, or remove the bad targets from the cluster.Implementation depends on your CMS or framework:
The checker crawls each declared locale variant, validates reciprocal return tags, language code syntax, x-default presence, sitemap consistency, target reachability, and canonical alignment. For the complete reference, see the Hreflang Guide or sample report.
Run the checker against your main locale pages — it will follow the cluster and validate every annotation reciprocally.
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