JSON to Code

Convert JSON to TypeScript interfaces, Go structs, Python dataclasses, Java classes, Rust structs, and C# classes. Free online tool with instant code generation. No signup required.

About JSON to Code Generator

Our JSON to Code Generator instantly converts JSON data into strongly-typed code for multiple programming languages. Supports TypeScript interfaces, Go structs with json tags, Python dataclasses with type hints, Java classes with getters/setters, Rust structs with serde attributes, and C# classes with properties. The tool handles nested objects, arrays, and automatically infers the correct types. Perfect for quickly creating type definitions from API responses or configuration files.

How to Use

Paste your JSON data or click Load Demo to try with sample data
Select your target programming language from the dropdown
The code is generated instantly as you type
Copy the generated code or download as a file
Use the generated types in your project

Frequently Asked Questions

How does the tool handle nested objects?

The generator creates separate type definitions for each nested object. For example, if your JSON has an address object inside a user object, it will create both User and Address types with proper references.

What about arrays of objects?

Arrays of objects are handled by creating a type for the array items. The tool analyzes the first item to determine the structure and generates appropriate array types like User[] in TypeScript or []User in Go.

Does it support nullable types?

Yes, null values in JSON are converted to appropriate nullable types for each language - null in TypeScript, *Type or interface{} in Go, Optional in Python, and nullable reference types in C#.

Can I customize the root type name?

The default root type name is Root. You can easily rename it in the generated code, or the tool will use meaningful names based on the JSON structure when possible.