The Signalor Schema Validator is a free JSON-LD and Schema.org coverage checker that scans any public URL for structured data completeness. It detects 18 schema types including Organization, Product, Article, FAQPage, HowTo, BreadcrumbList, Event, Review, AggregateRating, LocalBusiness, SoftwareApplication, and more. The validator flags missing required fields by property name, identifies partial definitions that confuse language model parsers, and catches conflicting duplicate JSON-LD blocks that cause AI engines to discard structured data entirely. Complete, valid schema is one of the strongest signals generative engines use when deciding whether to cite, paraphrase, or attribute a page. The free scan covers one URL with no account required. Pro plans add site-wide coverage rollups per template and ready-to-paste JSON-LD fix snippets ranked by projected GEO score improvement.
[ free tool · schema validator ]
Check JSON-LD coverage in seconds
Paste any URL and we'll scan the page for Organization, Product, Article, FAQ, and other JSON-LD schemas, flagging missing, partial, or malformed entries.
The validator checks 18 schema types including Organization, Product, Article, FAQPage, HowTo, BreadcrumbList, Event, and more. It surfaces missing required fields, partial definitions, and conflicting duplicate blocks that confuse AI engines and cost you citation opportunities. Free, no account needed.
18 schema types
Organization, Product, Article, FAQ, HowTo, BreadcrumbList, and more checked automatically.
Field-level flags
Missing required fields highlighted with the property name so engineers fix fast.
Duplicate detection
Catch duplicate or conflicting JSON-LD blocks that confuse AI engines.
Exportable
Download a JSON summary of all findings for your engineering or SEO team.
[ what's inside the full report ]
Unlock site-wide coverage
The free scan shows one URL. Sign up or upgrade to scan every URL, roll up coverage per template, and get ready-to-paste fix snippets.
Site-wide coverage
Roll-up per template: which URLs ship Organization, which are missing Product, where FAQ is inconsistent.
Fix suggestions
Ready-to-paste JSON-LD snippets for each missing field, ranked by GEO score impact.
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