JSON to Types

Convert JSON to TypeScript interfaces, Python dataclasses, Go structs, Rust structs, or Zod schemas. Select JSON, pick a language, get types instantly.

Features

5 Output Languages

• TypeScript - export interface with proper types
• Python - @dataclass with type hints
• Go - struct with JSON tags
• Rust - struct with serde derive macros
• Zod - Schema with z.infer type extraction

Smart Type Inference

• Detects string, number, boolean, null automatically
• Distinguishes integers from floats
• Handles nested objects as separate named types
• Processes arrays with element type inference

Multiple Workflows

• Select JSON in editor and run the command (Ctrl+Shift+J)
• Right-click context menu on selected JSON
• Convert from clipboard - paste JSON from any source

Nested Object Support

Complex nested JSON produces multiple separate types, each properly named from the key.

Example

Input JSON:

{
  "id": 1,
  "name": "Alice",
  "email": "alice@example.com",
  "address": {
    "street": "123 Main St",
    "city": "Springfield"
  },
  "tags": ["admin", "user"]
}

TypeScript Output:

export interface Address {
  street: string;
  city: string;
}

export interface Root {
  id: number;
  name: string;
  email: string;
  address: Address;
  tags: string[];
}

Commands

Settings

Use Cases

• API Development: Paste API response JSON, get typed interfaces instantly
• Database Modeling: Convert JSON documents to typed structs
• Code Generation: Rapid prototyping with type-safe models
• Learning: See how JSON maps to types in different languages

Installation

code --install-extension miccho27.json-to-types

Or search "JSON to Types" in the VS Code Extensions panel.

License

MIT