JSON Schema Validator

About JSON Schema Validator

JSON Schema is a vocabulary for annotating and validating JSON documents. It describes the structure, types, and constraints of your JSON data, enabling automatic validation in APIs, forms, and configuration systems.

Supported Validations

• Type checking: string, number, integer, boolean, array, object, null
• String: minLength, maxLength, pattern (regex)
• Number: minimum, maximum, exclusiveMinimum, exclusiveMaximum, multipleOf
• Array: minItems, maxItems, uniqueItems, items schema
• Object: required properties, additionalProperties, minProperties, maxProperties
• Enum: restrict to specific values
• Format: email, uri, date-time, ipv4, ipv6, uuid

FAQ

What JSON Schema version does this support?

This validator supports a practical subset of JSON Schema Draft-07, covering the most commonly used keywords. For advanced features like $ref, allOf/anyOf/oneOf, use a dedicated schema validator library.

Where is JSON Schema used?

API documentation (OpenAPI/Swagger), form validation, configuration files, database schema validation, CI/CD pipeline validation, and AI tool/function definitions.