Which languages are supported?

Swift (Codable), TypeScript interfaces, Python dataclasses, and Kotlin data classes.

Is my JSON sent to a server?

No. Model generation runs entirely in your browser.

Nested JSON objects become separate nested types named from parent keys.

Convert JSON into production-ready models for Swift, TypeScript, Python, or Kotlin.

Paste a JSON payload, pick your target language, and copy idiomatic structs, interfaces, or dataclasses.

Swift output includes safe decoding helpers; other languages use optional/nullable fields where JSON contains null.

Responsive

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Swift decode example

let model = try JSONDecoder().decode(Model.self, from: data)

TypeScript interface snippet

export interface User {
  id: number;
  name: string;
}

Which languages are supported?: Swift (Codable), TypeScript interfaces, Python dataclasses, and Kotlin data classes.
Is my JSON sent to a server?: No. Model generation runs entirely in your browser.
How are nested objects handled?: Nested JSON objects become separate nested types named from parent keys.