JSON to Code Converter

Generate typed data structures from JSON in 5 languages

JSON Input

Load sample:

Generated Code 

// Generated code will appear here
// Paste your JSON and click "Generate Code"

JSON to Code Converter: Generate Typed Structures Instantly

Working with APIs often means handling JSON data that needs to be mapped to typed structures in your codebase. Manually creating classes, interfaces, or structs from JSON is tedious and error-prone. Our JSON to Code Converter automates this process, generating production-ready code in Python, TypeScript, Go, Java, and C#.

Supported Languages

Python

Generates @dataclass with type hints

TypeScript

Generates interface definitions

Go

Generates struct with json tags

Java

Generates POJO with getters/setters

C#

Generates class with properties

How to Use

  1. Paste your JSON - Copy any JSON object into the input field
  2. Set the class name - Choose a name for your root class/interface
  3. Click Generate - The tool will analyze and convert your JSON
  4. Switch languages - View the output in different languages using tabs
  5. Copy the code - Use the copy button to grab the generated code

Features

  • Nested Object Support - Automatically generates separate classes for nested objects
  • Array Type Detection - Infers array element types correctly
  • Type Inference - Distinguishes between int, float, string, boolean
  • Naming Conventions - Uses appropriate naming for each language (camelCase, PascalCase, snake_case)
  • JSON Tags - Includes json tags for Go structs

Why It's Free

All processing happens in your browser using JavaScript. No server calls, no data storage, no tracking. This means we have zero infrastructure cost for this tool, and you get complete privacy. Your JSON never leaves your machine.

What if my JSON has inconsistent types?

The converter uses the first occurrence of each field to determine its type. If your JSON array contains objects with varying structures, the generated code will reflect the first object's structure. For production use, you may need to adjust the output to handle optional fields or union types.