What is hreflang and why does it need checking?

Hreflang is an annotation that tells search engines which language or regional version of a page to show a given searcher. It is checked separately from other tags because correctness is a property of the whole cluster of pages, not any single one: a mistake on one page invalidates the pages that reference it too, and none of them look wrong in isolation.

Why do hreflang tags need to be reciprocal?

If your English page links to your Turkish page with hreflang, the Turkish page must link back to the English page. Search engines discard one-way hreflang relationships entirely, so a missing return tag on just one page in a cluster can invalidate the whole group of annotations.

What language and region codes does hreflang use?

Hreflang uses ISO 639-1 language codes, optionally combined with an ISO 3166-1 Alpha-2 region code, such as en, en-GB or pt-BR. A common mistake is en-UK, which is invalid; the correct code is en-GB. Add x-default for your language selector or fallback page.

Can I check hreflang without an account?

Yes. Paste any URL and the instant check reads its hreflang annotations, fetches the pages they reference, and confirms self-reference, reciprocal return tags, valid language codes and live targets, free and with no signup. A full-site crawl to validate every language cluster on your domain needs a free account.

Does hreflang need to match the canonical tag?

Yes. Every hreflang annotation should point at the canonical, indexable URL of that language version. If hreflang references a URL that is itself canonicalised elsewhere, redirected, or noindexed, search engines drop the annotation rather than follow it, and the cluster loses that member.

Hreflang Checker - Check Hreflang Online Free

01Three ways to declare it

Google accepts hreflang in HTML <link rel="alternate"> tags, in HTTP headers, or in the XML sitemap. Any one method is enough; they are equivalent [1].

KEY FACTEvery version must list itself and all other versions. Missing return links can cause the annotations to be ignored [1].

02Codes must be valid

Language codes use ISO 639-1, with an optional region in ISO 3166-1 alpha-2, for example en-GB. A region on its own is not valid [1].

The special value x-default marks the page to show when no other language matches, typically a selector or the global version [1].

03Hreflang is a hint about audience

Google uses hreflang to serve the right version to the right user. It doesn’t move ranking signals between versions or fix duplicate content on its own [2].

Locale-adaptive pages that change content by IP can hide versions from Googlebot, which mostly crawls from the US. Separate URLs per locale are the recommended pattern [2].

04Keep canonicals consistent

Each version should self-canonicalise. A canonical pointing to another language tells Google the pages are duplicates, which conflicts with the hreflang cluster [3][1].

References

[1]Tell Google about localized versions of your page · Google Search Centraldevelopers.google.com/search/docs/specialty/international/localized-versions
[2]Managing multi-regional and multilingual sites · Google Search Centraldevelopers.google.com/search/docs/specialty/international/managing-multi-regional-sites
[3]How to specify a canonical URL with rel="canonical" and other methods · Google Search Centraldevelopers.google.com/search/docs/crawling-indexing/consolidate-duplicate-urls

CITE THIS PAGEKalenux. (2026). Hreflang checker: validate language and region annotations. Kalenux SEO Guide. Last reviewed 1 Oct 2026. kalenux.com.tr/seo-hreflang-checker

Hreflang CheckerThe right language for the right reader.

Hreflang is a two-way handshake.

Codes that work, and lookalikes that don't.

Three places to say it.

x-default catches the visitors you didn't plan for.

What Google documents about hreflang.

01Three ways to declare it

02Codes must be valid

03Hreflang is a hint about audience

04Keep canonicals consistent

References

Keep checking.