JSON Validator
Validate JSON syntax directly in your browser without sending it to a server.
Validation Result
How to validate JSON
Enter JSON and select Validate JSON. Your browser's standard JSON parser checks objects, arrays, and primitive values.
Syntax validation and schema validation differ
This page checks whether text follows JSON grammar. It does not know whether required business fields exist, whether a value has the expected type, or whether an API contract is satisfied; those checks require a separate JSON Schema or application rule.
How to use an error location
Start near the reported character and inspect the token immediately before it. A missing quote, bracket, colon, or comma often causes the parser to notice the problem at the next token rather than at the exact character where the mistake began.
Frequently Asked Questions
Is my JSON sent to a server?
No. Validation runs only in your current browser, and the input is not stored on a server or in a database.
Are comments and trailing commas allowed?
No. Standard JSON does not allow comments or a comma after the final item.