JSON to Code Converter

JSON describes data but not the language-specific model that an application uses. Choose a converter below to infer fields, arrays, nullable values, and nested objects from a representative JSON sample.

Each converter opens on its own canonical page with only the output options supported by that language.

• TypeScript creates interfaces or type aliases with optional, nullable, readonly, and export controls.
• JavaScript creates ES classes or JSDoc typedefs, with optional constructors and fromJSON helpers.
• Dart / Flutter creates null-safe model classes with configurable fromJson and toJson methods.
• Swift creates Codable structs or classes with optional CodingKeys.
• Java creates POJOs or records with typed lists, constructors, getters, and setters.

All parsing, type inference, and code generation run locally in the browser. JSON input, field names, root model names, and generated source are not uploaded, persisted, or placed in URLs.

The converters use deterministic language renderers rather than AI, so the same sample and options produce consistent output.