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Hreflang Validator API
Validate hreflang tags and check every return link.
Checks a page's hreflang annotations against Google's documented rules: HTML link tags and HTTP Link headers, ISO 639-1 language and ISO 3166-1 region codes, x-default, self-reference and canonical mismatches. It also fetches up to 10 alternates to verify each one links back, because Google ignores a declaration without a return link. An offline validate endpoint covers staging HTML. Returns a score, grade and issues with stable codes.
Hi, hreflang breaks quietly: one missing return link and Google ignores the whole declaration. This API fetches the page, validates every declaration, then fetches up to 10 alternates (the first 10 in declaration order) and checks that each links back. If some alternates could not be checked, the response says so with returnLinks.partial. Not covered, stated in the docs: XML sitemap hreflang, JavaScript rendering, judging a page's actual language, and which version Google really serves. Feedback welcome.
About Hreflang Validator API on Product Hunt
“Validate hreflang tags and check every return link.”
Hreflang Validator API was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #485 on the daily leaderboard. Checks a page's hreflang annotations against Google's documented rules: HTML link tags and HTTP Link headers, ISO 639-1 language and ISO 3166-1 region codes, x-default, self-reference and canonical mismatches. It also fetches up to 10 alternates to verify each one links back, because Google ignores a declaration without a return link. An offline validate endpoint covers staging HTML. Returns a score, grade and issues with stable codes.
On the analytics side, Hreflang Validator API competes within API and Developer Tools — topics that collectively have 621.7k followers on Product Hunt. The dashboard above tracks how Hreflang Validator API performed against the three products that launched closest to it on the same day.
Who hunted Hreflang Validator API?
Hreflang Validator API was hunted by GlowHalo. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of Hreflang Validator API including community comment highlights and product details, visit the product overview.
GlowHalo
Hi, hreflang breaks quietly: one missing return link and Google ignores the whole declaration. This API fetches the page, validates every declaration, then fetches up to 10 alternates (the first 10 in declaration order) and checks that each links back. If some alternates could not be checked, the response says so with returnLinks.partial. Not covered, stated in the docs: XML sitemap hreflang, JavaScript rendering, judging a page's actual language, and which version Google really serves. Feedback welcome.