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Check what your schema markup actually says
Inspect JSON-LD in a public page's static HTML and find invalid JSON, detected types, missing fields, and source markup.
Schema markup checker Free
Enter a page URL to inspect its static JSON-LD.
- Up to 50 JSON-LD blocks
- Type and syntax evidence
- JSON export
Inspection result
Structured data found
Declared types
A precise first check
Parsing is only the first layer.
JSON syntax
Malformed JSON-LD cannot be parsed. The checker reports the approximate line and column so you can return to the source block.
Declared structure
Detected @type values and basic warnings reveal what the page claims, without inventing a universal score.
Platform validation
Schema.org vocabulary and Google rich-result requirements are separate checks and can change independently.
Important boundaries
What this result does not promise
The checker reads JSON-LD from one page's static HTML. It does not validate Microdata or RDFa, execute browser JavaScript, certify every Schema.org property, or guarantee a rich result.
After fixing syntax, use the Schema.org validator for vocabulary validation and Google's Rich Results Test for supported search features. For repeatable extraction, use the Schema Markup Extraction API.
Common questions
Schema checker FAQ
Is valid JSON-LD automatically valid schema?
No. JSON syntax can be correct while a type or property is misspelled, misplaced, incomplete, or inconsistent with visible content.
Does valid schema guarantee a rich result?
No. Search platforms apply feature requirements, policies, crawling signals, and their own display decisions.
Why does the checker show no schema?
The page may not contain JSON-LD, the fetch may receive different HTML, or JavaScript may add the markup only after the initial response.
Check structured data against the page
The free Schema Markup Checker finds JSON-LD on a public webpage and helps you review types, properties, and parsing errors. Markup should describe information users can actually see.
Validation does not guarantee a rich result. Pair it with the broader SEO Page Inspector.
What to review
Confirm values, canonical URLs, dates, prices, and nested organization, author, product, or article entities.
Common problems
Watch for invalid JSON, duplicated entities, placeholder values, unsupported properties, and stale information.
Use schema carefully
Our AI search guide explains why schema is useful but not an AI citation shortcut.