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Emit alternate language link tags with basic syntax checks
International sites need reciprocal hreflang annotations, but typos in language codes or relative URLs break the set. A generator should validate basics without pretending it audited every return link on the live site or every CMS locale mapping table across environments.
Why this is worth doing in the browser
DevNestro’s Hreflang Tag Generator builds link rel=alternate tags from language, optional region, and absolute URL rows, optionally adding x-default. It warns on duplicate codes, weak language/region syntax, and non-http(s) URLs.
How to use the tool
Add a row per locale, set x-default if you have a fallback, generate, copy into the head or HTTP headers elsewhere, and verify live pages still return matching tags. Canonical Checker helps when locales disagree on self-canonicals.
- Use absolute https URLs.
- x-default is a fallback, not a language.
- Syntax OK ≠ full reciprocal audit.
- Keep region codes uppercase ISO alpha-2 when used.
Privacy
Local generation only. API: None.
Building locale alternates? Generate hreflang tags and validate the URLs before deploy.