JSON to Code

Convert JSON objects into strongly typed definitions for TypeScript, Go, Python, C#, Rust, and Java.

Processed securely in your browser — no data sent to server

What is JSON to Code?

JSON to Code is a free online tool that automatically generates strongly-typed code definitions from your JSON data. Whether you're working with API responses, configuration files, or any JSON structure, this tool instantly creates type-safe code for TypeScript, Go, Python, C#, Rust, and Java.

Why Use Type Definitions?

  • Catch errors early — Type checking finds bugs at compile time, not runtime
  • Better IDE support — Get autocomplete, refactoring, and inline documentation
  • Self-documenting code — Types serve as living documentation for your data structures
  • Safer refactoring — Change data structures with confidence across your codebase

Supported Languages

TypeScript

Generates clean interfaces with proper typing for frontend and Node.js projects.

Go

Creates structs with JSON tags, ready for encoding/json package.

Python (Pydantic)

Generates Pydantic models with type hints for data validation.

C#

Creates classes with JsonPropertyName attributes for System.Text.Json.

Rust

Generates structs with Serde derive macros for serialization.

Java

Creates classes with Jackson annotations and getter/setter methods.

Privacy First

Your JSON data never leaves your browser. All conversion happens locally using JavaScript — no server requests, no data storage, no tracking. Perfect for working with sensitive API responses or proprietary data structures.

Common Use Cases

  • Converting REST API responses into typed models
  • Creating data transfer objects (DTOs) from JSON schemas
  • Generating type definitions for configuration files
  • Bootstrapping data models for new projects
  • Migrating between programming languages with consistent types