Free Hreflang Tag Checker and Validator
Our free hreflang checker validates international SEO hreflang tags for accuracy and best practices. The tool checks for valid ISO 639-1 language codes, proper URL formatting, presence of x-default tags, duplicate hreflang values, and reciprocal linking requirements. Perfect for webmasters, SEO professionals, and developers managing multilingual or multi-regional websites. The validator instantly analyzes your hreflang implementation and provides color-coded results: green for valid tags, red for errors, and orange for warnings. Common errors detected include invalid language codes, malformed URLs, duplicate hreflang attributes, and missing x-default tags. Warnings include missing reciprocal links, incorrect region code formatting, and other best practice violations. Hreflang tags are HTML attributes used to tell search engines about language and regional variants of a page, helping Google serve the correct language version to users in different countries. Proper hreflang implementation prevents duplicate content issues, improves international SEO, and ensures users see content in their preferred language. All validation happens locally in your browser with no server delays or data storage.
Hreflang Checker Features
Validate ISO 639-1 language codes (en, es, fr, etc.)
Check ISO 3166-1 alpha-2 region codes (US, GB, CA, etc.)
Detect x-default tag presence
Find duplicate hreflang values
Validate URL format and structure
Check for proper reciprocal linking
Line-by-line error reporting
Color-coded validation summary
Detailed error and warning messages
Support for language-only and language-region formats
Table view of all detected tags
Instant browser-based validation
No registration or login required
Privacy-focused - all processing local
Why Validate Hreflang Tags
Prevent international SEO errors and penalties
Ensure proper language targeting in search results
Avoid duplicate content issues across regions
Improve user experience for international visitors
Help Google understand your multilingual structure
Verify reciprocal linking between language versions
Catch common hreflang implementation mistakes
Ensure x-default fallback for unmatched regions
Validate before deploying to production
Maintain consistent international SEO standards
Common Use Cases
Validating multilingual website hreflang implementation
Checking multi-regional content targeting
Auditing international SEO setups
Debugging hreflang errors in Search Console
Verifying hreflang tags before site launch
Testing language switcher implementations
Quality assurance for global e-commerce sites
Checking CMS-generated hreflang tags
Validating hreflang for content localization
SEO audits for international clients
Troubleshooting wrong language in search results
Verifying hreflang after site migrations