Our advanced JSON Schema Validator allows you to validate JSON data against schemas in real-time. Ensure your JSON structures comply with specifications without server processing. Ideal for API development and data validation.
Privacy Guaranteed: Your JSON data is processed locally in your browser. Nothing is stored or sent to any server.
Why Validate JSON with Schemas?
Data Integrity
Ensure incoming data matches expected formats and types before processing.
API Development
Validate API requests and responses to maintain consistent interfaces.
Error Prevention
Catch data structure issues early in the development process.
How to Use the JSON Schema Validator
Validate your JSON data in three simple steps:
- Enter your JSON data in the left text area.
- Enter your JSON Schema in the right text area.
- Click “Validate JSON” or simply wait for real-time validation.
Use the “Format JSON” button to properly format your code for better readability and “Load Example” to see a pre-filled, working example.
A Deeper Dive into JSON Schema
JSON Schema is a powerful language for describing the structure of your JSON data. This ensures consistency, reliability, and clear documentation for anyone consuming your data.
Core Validation Keywords
type: Specifies the data type (e.g., “string”, “number”, “object”, “array”).properties: Defines validation rules for each key-value pair in an object.required: An array listing which properties are mandatory.items: Defines the schema for elements within an array.pattern: A regular expression that a string value must match.
Frequently Asked Questions
JSON Schema is a vocabulary that allows you to annotate and validate JSON documents. It provides a contract for the structure of JSON data, including required fields, data types, and value constraints.
Validating JSON ensures data integrity, prevents errors in downstream processing, and maintains consistency in APIs. It helps catch issues early and provides clear expectations for data consumers.
Yes, all validation happens locally in your browser. Your JSON data never leaves your computer and is not sent to any server. This ensures complete privacy and security for sensitive data.
You can reuse schemas by defining common structures in a definitions or $defs block and referencing them with the $ref keyword (e.g., {"$ref": "#/definitions/mySchema"}).