What is JSON Schema?

JSON Schema is a vocabulary for describing the structure of JSON data — the expected types, required properties and value constraints — so documents can be validated automatically.

Primary sources

Specifications cited by the tools below whose own titles define JSON Schema.

JSON Schema specificationJSON Schema

3 tools that work with JSON Schema

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Developer Tools1

JSON Schema GeneratorInfer a JSON Schema from example data, detecting types, string formats and required keys.

Samples & Mock Data1

Sample JSON GeneratorTurn a JSON Schema into realistic sample documents, respecting types, enums, formats and constraints.

AI & LLM Tools1

LLM Tool Schema ConverterMove a function definition between OpenAI, Anthropic, Gemini, MCP and bare JSON Schema — or emit it as a TypeScript type or Zod schema.

Related terms

Terms that appear alongside JSON Schema on the same tools.

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