TypeScript Types for Config and Settings Objects

Generate TypeScript interfaces from JSON configuration files to add type safety to your application settings.

Hakuna kuingia kinachohitajika

Root interface name

JSON input

TypeScript output

export interface User {
  id: number;
  name: string;
  email: string;
  isActive: boolean;
  score: number;
  tags: string[];
  address?: null;
}

export interface Root {
  user: User;
  createdAt: string;
  version: number;
}

Config tips

⚙️

Paste your app config JSON (e.g., from appsettings.json or config.json) to generate a strongly typed Config interface for TypeScript projects.

💡

Using interfaces for config objects prevents runtime errors from typos in property names — TypeScript catches them at compile time.

📋

For environment configs with optional overrides, manually change generated field types to "field?: type" after generating to reflect optional values.

🔍

Switch to "type alias" mode for simpler config shapes — type aliases are often preferred for plain data objects without extension or declaration merging.