Skip to content
Rescue 404
Rescue

Free tool

Schema Validator

Validate JSON-LD syntax and review Schema.org types, missing recommended properties, and relationship issues.

Primary use
Go beyond “valid JSON” — understand what schema exists and what is incomplete.
Estimated time
About 4 minutes
Input type
URL or paste
Use the tool All free tools

A practical JSON-LD review

Check JSON syntax, detect Schema.org entities, and identify missing commonly recommended fields before using search-engine-specific testing.

Not a rich-results guarantee

Valid JSON-LD and even valid Schema.org vocabulary do not guarantee indexing, rankings, or rich results. Eligibility depends on current search-engine policies and the visible page content.

This review is not a rich-results guarantee.

Methodology

  • Parses JSON-LD with the browser JSON parser, then walks @graph and nested typed entities.
  • Checks a focused set of commonly recommended properties for known entity types.
  • Reports duplicate @id values and relationship notes as review prompts.

Limitations

  • Does not guarantee Schema.org vocabulary correctness, search indexing, rankings, or rich results.
  • Does not test rendered JavaScript, page policy compliance, or search-engine eligibility.
  • Review all suggested snippets before publishing; examples are not drop-in business data.

Privacy

Pasted JSON-LD and HTML stay in your browser. URL analysis fetches only public HTML through the protected fetch service.

FAQ

Plain answers about what this tool does and does not claim.

Can I paste full HTML? +
Yes. The tool extracts application/ld+json script blocks from pasted or fetched HTML.
Does this validate every Schema.org rule? +
No. It provides a focused structural review, not a complete vocabulary or Rich Results Test replacement.
Should schema match visible content? +
Yes. Structured data should accurately represent content available to users on that page.

Related tools

Related guides

Related services

Website Health Check Request Rescue

Have Rescue404 investigate these technical issues

Useful when metadata, schema, or crawl directives are tangled with hosting, redirects, or theme output.

Request a technical review Website Health Check

Results stay free. No account required to use the tool.