How to Generate TypeScript Interfaces, Zod & Python Pydantic Models from JSON Online

Converting raw API JSON responses into strongly-typed code models is a daily necessity for modern web and backend developers. Instead of writing boilerplate interfaces by hand, you can automatically infer type definitions directly in your browser.

🚀 Try the 1-Click Type Generator on JSON OS

Supported Target Languages & Frameworks

TypeScript Interfaces: Infers nested interfaces, optional property types, and array unions.
Zod Runtime Schemas: Generates export const UserSchema = z.object({...}) for runtime payload validation.
Python Pydantic Models: Generates class Model(BaseModel): ... with field alias mappings.
Rust Serde Structs: Generates #[derive(Serialize, Deserialize)] pub struct ....
Go Structs: Generates type Model struct { ... json:"..." }.
Draft-07 JSON Schema: Formal JSON Schema definitions.

Why Local-First Type Generation Matters

Many online type converter websites upload your confidential API responses to third-party servers. JSON OS performs all type inference locally inside your browser Web Worker — ensuring your data and API structures remain 100% private.

How to Use the Type Generator

Open JSON OS Workbench.
Paste or drag your JSON payload.
Click Types in the toolbar or press Cmd+K and search for Generate Types.
Choose your target language (TS, Zod, Python, Rust, Go) and click Copy Code or Download File.