FeaturedSnippet
Checks the bidirectional rule

Hreflang Checker

Drop a URL and we extract every link rel="alternate" hreflang declaration, validate language and region codes (ISO 639-1 + 3166-1), check for x-default, and fetch the first 5 alternates to verify each one reciprocally declares your URL.

Fetches the page, extracts hreflang declarations, validates language codes, and checks reciprocity on the first 5 alternates.