- JSON validity
- @type values
- Duplicate blocks
- Missing important properties
- Mismatch with visible content
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40 toolsSchema Tester
Find JSON-LD blocks, validate JSON and list Schema.org types.
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ABOUT THIS CHECK
Schema Tester
Detects JSON-LD structured data blocks and validates their JSON syntax.
WHY IT MATTERS
Structured data can help search systems understand entities and page meaning when it accurately reflects visible content.
Valid, accurate Schema.org markup that describes what users can actually see.