Developer Guide

Convert JSON to TypeScript, Python, and Go types

Automatic type generation for modern engineering workflows

Why generate types from JSON?

Manually typing API responses creates friction and introduces human typing mistakes. Automating type definitions ensures end-to-end type safety, IDE autocompletion, and compile-time error detection across frontend and backend stacks.

TypeScript Interfaces

TypeScript interfaces map JSON objects to typed definitions, preserving nested object shapes and primitive arrays:

interface UserProfile {
  id: number;
  name: string;
  roles: string[];
  metadata: {
    lastLogin: string;
    verified: boolean;
  };
}

Python Dataclasses & Pydantic Models

Python 3.7+ dataclasses provide clean type annotations for backend deserialization:

from dataclasses import dataclass
from typing import List

@dataclass
class UserProfile:
    id: int
    name: str
    roles: List[str]

Go Structs with JSON tags

Go requires struct tags to unmarshal JSON keys into PascalCase fields:

type UserProfile struct {
    ID    int      `json:"id"`
    Name  string   `json:"name"`
    Roles []string `json:"roles"`
}

Generate Types in One Click

Use JSONLints Studio to paste your JSON payload, navigate to the Convert & Types tab, and select TypeScript, Python, or Go to generate clean, production-ready types instantly.