# Hreflang Checker — llms.txt

> A free hreflang tag checker tool powered by Weglot.
> Validate hreflang implementation on multilingual websites for correct international SEO.

## What is this tool?

Hreflang Checker (hreflangs.com) is a free online SEO tool that analyzes hreflang tags on any webpage.
It helps SEO professionals and developers detect errors in multilingual/multiregional hreflang configurations.
The tool simulates requests from major search engine bots (Googlebot, Bingbot, Baidu, Yandex, Yahoo).

## Main pages

- [Hreflang Checker Tool](https://www.hreflangs.com/): Enter a URL and select a user agent to instantly audit hreflang tags.
- [What Are Hreflang Tags?](https://www.hreflangs.com/what-are-hreflang-tags.php): A complete guide explaining hreflang attributes, syntax, and use cases for international SEO.
- [Best Practices & Common Mistakes](https://www.hreflangs.com/best-practices-and-common-mistakes.php): Detailed guide on implementing hreflang correctly and avoiding the most frequent errors.
- [ISO Language & Country Codes List](https://www.hreflangs.com/iso-codes-list.php): Full reference of ISO 639-1 language codes and ISO 3166-1 country codes used in hreflang attributes.

## Key concepts covered

- Hreflang tag syntax: `<link rel="alternate" hreflang="lang-COUNTRY" href="URL" />`
- x-default hreflang for fallback pages
- Return tag / reciprocal link requirements
- Common hreflang errors: missing return tags, wrong ISO codes, conflicting signals
- Difference between language targeting and country targeting
- Hreflang in HTTP headers and XML sitemaps
- ISO 639-1 language codes (e.g., en, fr, de, zh)
- ISO 3166-1 alpha-2 country codes (e.g., US, FR, GB, CN)

## About

- Tool developed with Weglot, the multilingual website solution
- Supports crawling with: Googlebot, Bingbot, Yahoo Slurp, Baiduspider, Yandexbot
- Contact / source: support@weglot.com / https://www.hreflangs.com/