Validate JSON Against Schema

JSON Schema is a powerful tool for validating the structure of JSON data. It allows you to define the expected format, data types, required fields, and constraints for your JSON documents. Schema validation ensures data consistency, prevents errors, and provides clear documentation of your data structures.

What is JSON Schema?

JSON Schema is a vocabulary that allows you to annotate and validate JSON documents. It describes your existing data format with clear, human-readable documentation and provides complete structural validation. JSON Schema is useful for automated testing, quality control, and data validation in APIs, configuration files, and data interchange.

Key Schema Features

• Type Validation: Ensure values are the correct type (string, number, object, array, boolean, null)
• Required Properties: Specify which properties must be present
• String Constraints: minLength, maxLength, pattern (regex)
• Number Constraints: minimum, maximum, multipleOf
• Array Constraints: minItems, maxItems, uniqueItems
• Enum Values: Restrict values to a predefined set
• Format Validation: email, uri, date-time, etc.

Our free JSON Schema validator provides instant validation with all processing happening locally in your browser. Your data stays private while you ensure your JSON conforms to your specifications.