hreflang validation tool for international SEO

Here are some good hreflang validation tools for international SEO:

Free / easy-to-use

• Ahrefs Webmaster Tools – can help spot hreflang issues during site audits.
• Google Search Console – not a dedicated validator, but it reports hreflang and indexing problems.
• Merchynt Hreflang Tool – simple online checker for hreflang tags.
• Screaming Frog SEO Spider – free version for small sites; paid version is excellent for hreflang audits.

Paid / more advanced

• Sitebulb – strong technical SEO crawler with hreflang checks and reports.
• Semrush Site Audit – detects hreflang implementation issues.
• Lumar (formerly Deepcrawl) – enterprise-grade site crawler with international SEO checks.
• ContentKing – real-time monitoring, including hreflang changes/issues.

What a good hreflang validator should check

• Correct language/region codes, like en, en-us, fr-ca
• Reciprocal hreflang references between pages
• Self-referencing hreflang tags
• Canonical tags not conflicting with hreflang
• Missing return links
• Invalid URLs, redirects, or 404s
• x-default usage where appropriate

Quick recommendation

If you want a fast, practical option, use:

• Screaming Frog for crawling
• Google Search Console for validation feedback
• Sitebulb if you want cleaner reporting

If you want, I can also give you:

1. a list of the best hreflang tools by budget, or
2. a step-by-step hreflang validation checklist.