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JSON to TypeScript Interface Generator

Generate clean TypeScript interfaces and type definitions from JSON data with nested objects, arrays, and optional fields.

Quick Summary: Convert JSON to TypeScript interfaces and type aliases online. Clean nested types, optional properties, and instant client-side generation.

Input & Controls

Source Input 0 characters

Result Output

What is JSON to TypeScript Interface Generator?

JSON to TypeScript Generator automatically analyzes your JSON API payloads and infers strong TypeScript interfaces and types. Handles deeply nested objects, heterogeneous arrays, and PascalCase interface naming.

Unlike traditional online utilities that upload your sensitive payloads to a remote server, TechnoLila's JSON to TypeScript Interface Generator executes 100% locally in your web browser using modern JavaScript APIs, HTML5 Canvas, and SVG vector rendering. No barcodes, asset IDs, Wi-Fi credentials, tokens, or proprietary payloads ever leave your device.

How to Use JSON to TypeScript Interface Generator Online

1. Paste your JSON payload into the input box.
2. Specify your root interface name (e.g. UserProfile, ApiResponse).
3. Choose between Interface or Type Alias mode.
4. Copy the generated TypeScript type definitions.

JSON to TypeScript Interface Generator Example

Example Input:

{"id": 1, "name": "Jane", "roles": ["admin", "editor"], "settings": {"darkMode": true}}

Example Output:

export interface User {
  id: number;
  name: string;
  roles: string[];
  settings: UserSettings;
}

export interface UserSettings {
  darkMode: boolean;
}

Common Use Cases

• Frontend Development: Create type-safe API client interfaces in React, Next.js, Vue, and Angular.
• GraphQL & REST Schema Modeling: Rapidly prototype typed DTOs from sample responses.