JSON to TypeScript & Zod Schema Studio Client-Side
Convert arbitrary JSON data into strictly typed TypeScript interfaces, Zod runtime schemas, JSON Schema (Draft-07), Python Pydantic models, Go structs, and Rust Serde types with automatic type inference, array union merging, and format detection.
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Interactive Schema Validator Sandbox
Test validate an arbitrary JSON payload against your inferred schema right in the browser. See instant pass/fail diagnostics, path errors, and type discrepancies.
Schema Engineering & Type Generation Reference
TypeScript: Interface vs Type
TypeScript interface definitions enable declaration merging and provide slightly faster type-checker compiler performance in large projects. type aliases support direct union definitions (A | B) and primitive primitives. TypeForge automatically switches between interface and type alias depending on whether the root payload is an object or a heterogeneous array.
Zod v3+ Runtime Validation
Static TypeScript types vanish at compile-time. Zod provides runtime schema validation that parses and validates untrusted external HTTP request bodies, environment variables, or webhook payloads. Using z.infer<typeof Schema> guarantees zero type-drift between your runtime validation and static TypeScript contracts.
Polymorphic Array Inference
When feeding an array of objects to TypeForge, our engine compares all elements across the dataset. If a field exists in only a subset of elements, it is automatically marked optional (? or .optional()). If field types diverge (e.g. number vs string), the engine infers safe union types.