JSON Schema & Code Generation
Turn a real JSON sample into types, schemas, and validators across the stacks you actually ship in.
Generating from real data beats hand-typing every time. The tools here infer types and schemas from JSON samples for TypeScript, Zod, Pydantic, JSON Schema (Draft 2020-12), and GraphQL SDL — with proper nullability, optional fields, and nested types. Refine the output in-tool, then copy into your codebase.
Tools in this collection
JSON to TypeScript Interface Generator
Generate accurate TypeScript interfaces from any JSON sample. Optional types, unions, nested shapes. Free, browser-based.
JSON to Zod Schema Generator
Convert a JSON sample into a Zod schema with optional fields, unions, and nested shapes. Free, browser-based.
JSON to Pydantic Model Generator
Generate Pydantic v2 models from a JSON sample. Optional fields, nested models, type hints. Free, browser-based.
JSON to JSON Schema Converter
Generate a JSON Schema (Draft 2020-12) from any JSON sample. Optional/required detection, format hints. Free, browser-based.
JSON to GraphQL Type Generator
Generate GraphQL SDL types from a JSON sample. Nested types, lists, nullability, scalar mapping. Free, browser-based.