TypeScript Types for Config and Settings Objects

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

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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.