Hreflang Validator & Checker for International SEO

Hreflang Tag Checker API | SEO Validator

andok/hreflang-checker

Bulk validate website hreflang tags for international SEO. Audit multi-language sites for missing x-default tags, bidirectional errors, and ISO code compliance.

Extract and validate hreflang tags from web pages for international SEO audits and monitoring.

Hreflang Tag Checker

maximedupre/hreflang-checker

Check public pages for hreflang declarations and SEO findings. Get language or region codes, target URLs, coverage details, HTTP status, and a compliance grade in a dataset.

Hreflang Tags Extractor

benthepythondev/hreflang-tags-extractor

Extract hreflang alternate tags from international SEO pages.

Validate hreflang annotations after a domain or site migration: locale syntax, duplicates, target health, canonicals, x-default, self-references, reciprocal return links, and old-domain references.

Passive bulk check of HSTS, CSP, cookie flags, HTTPS redirect, TLS versions and certificate expiry. A-F grade with prioritised fix recommendations.

Audit a public page's hreflang alternate tags in one API call. Reports x-default, duplicate and invalid values, self-reference, score, and recommendations for international SEO QA.

✅ Score any domain (0-100) for ChatGPT Search, Perplexity, Claude & Gemini citation readiness ($15/1k domains). ✅ Audits /llms.txt, robots.txt AI crawlers (GPTBot/ClaudeBot), Schema.org JSON-LD & auto-generates a ready-to-deploy /llms.txt file.

Seo Schema Validator

naive_zing/seo-schema-validator

Bulk validate schema markup and JSON-LD across your entire website by crawling sitemaps. Generate agency-ready SEO health reports with per-page health scores for improved rich results and technical SEO audits.

Validate hreflang implementation (<link rel="alternate" hreflang=...>) to prevent international SEO issues. Detects missing/duplicate hreflangs, invalid language-region codes, missing self reference, and optional reciprocal hreflang checks.