Schema Markup Validator
Schema.org's official markup validator for checking JSON-LD, Microdata, and RDFa against Schema.org vocabulary.
- Category
- Structured Data Validation
- Pricing
- Free
- Use Case
- Validate structured data against Schema.org vocabulary
- Status
- Active
What the Schema Markup Validator Checks
The Schema Markup Validator checks structured data against the Schema.org vocabulary. It can inspect JSON-LD, Microdata, and RDFa, show the entities it detects, and identify vocabulary or syntax problems. It is the broader validation tool when the markup is not limited to a Google-supported rich result.
How to Use It
- Test the public URL or paste the markup.
- Review every detected entity and its properties.
- Resolve errors before warnings.
- Check identifiers, URLs, dates, and entity relationships manually.
- Use Google's Rich Results Test separately when Google feature eligibility matters.
What Validation Does Not Prove
A clean result does not prove that the structured data is accurate, visible on the page, useful to a search system, or eligible for a specific search feature. The validator cannot decide whether two identifiers refer to the same real entity or whether a claim is supported by the page. It also cannot guarantee indexing, citation, or rich-result display.
The strongest implementation keeps markup aligned with visible content, uses stable identifiers, avoids unsupported claims, and is retested after templates or content models change. Validation is a quality-control step, not the outcome.