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seo-hreflang

Validate and generate hreflang tags for multilingual websites.

31|8|Updated Mar 15, 2026
Search Tags:#validation#sitemap#multilingual#hreflang#international-seo#language-codes
One-click install
npx skills add https://github.com/citedy/adclaw --skill seo-hreflang-citedy
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: seo-hreflang
Source: https://github.com/citedy/adclaw/tree/main/src/adclaw/agents/skills/seo-hreflang
Command: npx skills add https://github.com/citedy/adclaw --skill seo-hreflang-citedy

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Validate and implement correct hreflang configurations across multilingual websites to improve international SEO and prevent indexation and signal issues.

Core Features & Use Cases

  • ISO code validation: Verifies language codes against ISO 639-1 and region qualifiers against ISO 3166-1.
  • Bidirectional checks: Ensures return tags are present across all language variants.
  • x-default handling: Generates and validates a proper fallback variant for unmatched languages.
  • Multi-method output: Generates HTML link tags, HTTP headers, or sitemap entries depending on implementation needs.
  • Cross-domain support: Works across domains with consistent protocols and correct cross-domain mappings.

Quick Start

Provide your site URLs and language variants to generate and validate hreflang tags.

Frequently Asked Questions about seo-hreflang

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I validate hreflang tags for a multilingual website?▼

Hreflang validation checks multilingual website configurations by verifying ISO 639-1 language codes, ISO 3166-1 region qualifiers, canonical URL alignment, protocol consistency, and bidirectional return tags across all language variants.

What is the best way to generate hreflang tags for international SEO?▼

The best way to generate hreflang tags for international SEO is to input site URLs and language variants to output ready-to-implement configurations, including proper x-default fallback variants for unmatched languages.

Can I implement hreflang annotations in an XML sitemap instead of HTML link tags?▼

Yes, you can implement hreflang in XML sitemaps. This tool generates ready-to-implement hreflang configurations across multiple methods, outputting HTML link tags, HTTP headers, or sitemap entries depending on your implementation needs.

Does hreflang validation work with cross-domain setups for multiple language variants?▼

Hreflang validation works with cross-domain setups by verifying consistent protocols and correct cross-domain mappings across multiple language variants, ensuring bidirectional return tags are present between different domains.

Why does my hreflang implementation need an x-default fallback variant?▼

An x-default fallback variant is needed because it serves a default page for unmatched languages. This tool generates and validates a proper x-default variant to prevent international SEO indexation and signal issues.

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