Hreflang Generator & Validator
Generate hreflang alternate-link tags for multi-language pages, with local validation for duplicates, code shape, and an x-default fallback.
Language/region codes are checked for structural shape only (e.g. "en" or "en-US") — this tool doesn't maintain (or invent) a full list of real, assigned language and region codes. It also cannot verify that the pages you've listed actually link back to each other, since it never fetches any live page — reciprocal hreflang is something search engines expect, and you'll need to confirm it yourself on the actual live pages.
Generated entirely in your browser — nothing you enter here is sent to a server, and no page is fetched.
Generate <link rel="alternate" hreflang="..."> tags for a set of language/region alternates of the same page, including an x-default fallback. Language/region codes are checked for structural shape (e.g. "en-US"), not against a maintained list of every real assigned code.
Search engines expect hreflang to be reciprocal — each alternate page should link back to all the others. This tool can't verify that for you, since it never fetches your live pages; check reciprocity yourself before relying on this markup.