JSON to Code
Online JSON to code converter for TypeScript, Java, C#, Go, Python and more, ideal for API schema generation, model scaffolding, and development debugging.
JSON to Code Guide
This tool converts JSON structures into typed code models for multiple languages, useful for API modeling, entity scaffolding, and cross-team integration.
How to Use
- Paste JSON into the input area, or click Sample to load demo data.
- Choose a target language and set the root class name.
- Click Generate, or let the tool regenerate automatically on input changes.
- Review highlighted output and copy it into your project.
Key Features
- Supports TypeScript, C#, Java, Go, Python, Swift, Kotlin, Rust, Dart, and PHP.
- Infers strings, integers, floats, booleans, arrays, objects, and nullable fields.
- Builds nested type definitions automatically for deep JSON structures.
- Handles array root JSON and generates aliases or item models accordingly.
- Runs entirely in the browser to keep source data local and private.
Type Mapping
| JSON Type | TypeScript | C# | Java | Go | Python |
|---|---|---|---|---|---|
| string | string | string | String | string | str |
| number(int) | number | int | Integer | int | int |
| number(float) | number | double | Double | float64 | float |
| boolean | boolean | bool | Boolean | bool | bool |
| array | T[] | List<T> | List<T> | []T | List[T] |
| object | interface | class | class | struct | @dataclass |
Use Cases
- Generate client-side models quickly during API integration.
- Rebuild backend entities when contract fields change frequently.
- Create typed structures for data-analysis scripts from sample JSON.
- Demonstrate cross-language type mapping in reviews and training.