How this free tool helps
This tool catches JSON syntax problems and reports declared @type values. Rich-result eligibility has additional search-engine-specific requirements.
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Free Schema Markup Validator
Check JSON-LD structured data for valid JSON, declared schema types and common structural problems. Review your markup before publishing it or before moving on to search-engine-specific rich-result testing.
Validate syntax before eligibility
First make sure JSON-LD parses and uses sensible types and properties. Then separately check whether a search feature has additional required fields or content policies.
Common mistakes to avoid
A schema block can be syntactically valid while describing information that is absent, outdated or misleading on the visible page.
What to do after using this tool
Fix parse errors and factual mismatches, then use the relevant official testing tool for feature-specific eligibility after deployment.
Frequently Asked Questions
What does the Schema Markup Validator check?
It checks JSON-LD blocks for valid JSON and identifies declared schema types and basic structural issues the tool can determine from the supplied markup.
Is this a replacement for Google Rich Results Test?
No. Search engines apply product-specific eligibility rules that can change. Use this validator for markup quality, then use the relevant official testing tools when rich-result eligibility matters.
Can valid JSON-LD still be misleading?
Yes. Structured data should accurately represent visible page content. Technically valid markup that describes information not present on the page can still be inappropriate.
Can schema be valid JSON but invalid structured data?
Yes. JSON syntax can be correct while properties, types or values do not conform to the intended Schema.org structure or a search feature’s requirements.
Should I validate the final live page as well as the code snippet?
Yes. Templates, escaping and deployment can change markup, so validating the live implementation is more reliable than checking only a draft snippet.
Continue Your SEO Workflow
Review structured data and page metadata using Schema Markup Generator, Meta Tag Checker, HTML Source Viewer and Open Graph & Social Meta Generator. Each check covers a different aspect of your website, so compare the evidence before making changes.