Canonical Tag Validator

Canonical Consistency Audit

zerobreak/canonical-consistency-audit

A canonical consistency audit tool that crawls any list of URLs, inspects canonical tags, and flags missing, duplicate, or mismatched canonicals so SEO teams can fix indexation issues before they damage rankings.

Checks public URL redirects, final HTTP status, canonical URLs, and expected migration targets.

Canonical URL Consistency Checker

junipr/canonical-url-consistency-checker

Check canonical URL declarations against final fetched URLs, robots signals, redirects, target status, and duplicate canonical groups.

Canonical & Hreflang SEO Auditor

glowing_glove/canonical-hreflang-auditor

Audit canonical URLs, hreflang annotations, duplicate language targets, and international SEO signals.

Title, description, canonical, and Open Graph tags from many URLs.

Canonical/Hreflang Bulk QA

checksmithcats/canonical-hreflang-bulk-qa

Scan public static HTML for canonical and hreflang link-tag signals before launches, migrations, or template changes.

Html Lang Validator

zerobreak/html-lang-validator

HTML lang validator that checks any webpage for missing or invalid lang attributes, so developers and SEO teams can fix language tag errors across large sites without clicking through pages one by one.

Check <link rel="canonical"> tags on any page to prevent duplicate-content SEO issues. Detects missing or multiple canonicals, invalid/relative canonicals, cross-domain canonicals, and mismatches after redirects.

Title Tag Analyzer

zerobreak/title-tag-analyzer

Title tag analyzer that checks page titles and meta descriptions across any list of URLs, so SEO teams can catch missing or oversized tags before rankings slip.

Meta Description Analyzer

zerobreak/meta-description-analyzer

Meta description analyzer that checks any URL for missing or incorrectly sized meta descriptions, so SEO teams can catch and fix issues before they cost search rankings.