Data / Syntax
JSON Validator
Get a direct valid or invalid result. If parsing fails, inspect the syntax message and its reported position without reformatting the input.
Validation scope
This tool checks JSON syntax using the browser's native parser. It can confirm that a document is structurally valid JSON, but it does not validate the document against a JSON Schema or judge whether field names and values fit an application's rules.
For a valid document, the root type and character count are shown. For invalid input, location details appear when the browser supplies a parse position.