JSON Validator

The JSON Validator checks whether a document follows valid JSON syntax and points to problems such as missing commas, unmatched brackets, invalid quotation marks, or trailing characters. Correct JSON is essential for APIs, configuration files, data exchange, and JSON-LD structured data; one syntax error can prevent an application or search engine from reading the entire payload.

Paste the JSON to validate and format it into a readable structure. The reported position helps narrow down the error, but semantic requirements still depend on the receiving API or schema. A syntactically valid JSON-LD document, for example, may still contain unsupported properties or incorrect values and should also be checked with the appropriate structured-data validator.