Paste your structured data. We'll check it's valid JSON and flag common schema.org mistakes.
Paste your structured data to check it's valid JSON, uses a proper @context and declares a recognised @type, before search engines quietly ignore it.
01
JSON syntax
Missing commas, stray quotes and unclosed brackets that make the whole block unreadable.
02
@context
Whether it points to schema.org correctly.
03
@type
Whether each item declares a type, and whether it's one search engines recognise.
04
Nested items
Graphs and nested objects checked item by item.
- 1
Copy your JSON-LD
Take the script content from your page source or CMS.
- 2
Paste it in
The checker parses it and lists any errors.
- 3
Fix and retest
Correct the errors, then confirm eligibility in Google's Rich Results Test.
Valid
The JSON parses, the context is correct and every item has a recognised type.
Unrecognised type
Valid JSON, but a type search engines don't use for rich results.
Syntax error
One error makes the entire block unreadable, so none of it counts.
Search engines skip structured data they can't parse, without telling you. A quick syntax check catches the small mistakes that quietly undo your markup, especially after hand edits or CMS changes.
About the JSON-LD syntax reviewer.
No. This checks syntax and basic structure quickly. Google's test checks whether your markup is eligible for specific rich results.