JSONToTable

JSON to TypeScript Converter

Convert JSON data to TypeScript interfaces and types

JSON Input

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TypeScript Output

TypeScript code will appear here

Paste JSON in the input area to get started

How to Convert JSON to TypeScript - Step by Step Guide

Step 1

Input Your JSON Data

Start by adding your JSON data that needs to be converted to TypeScript interfaces. The tool will analyze the structure and generate type-safe TypeScript definitions:

•
Paste JSON: Copy and paste your JSON data directly into the editor
•
Upload JSON file: Click upload to select JSON files from your computer
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Try sample data: Click "Sample" to load example JSON and see the conversion
Step 2

Configure TypeScript Options

Customize the TypeScript interface generation to match your project requirements:

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Interface naming: Specify root interface name and naming conventions
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Optional properties: Generate optional properties with proper TypeScript syntax
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Export format: Choose between interfaces, types, or classes
Step 3

Generate TypeScript Definitions

Get your complete TypeScript interfaces ready for use in your projects:

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Type-safe interfaces: Generated interfaces with proper TypeScript syntax and type annotations
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Nested types: Automatic generation of nested interfaces for complex objects
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Copy or download: Copy to clipboard or download as .ts file

Example: Converting API Response JSON to TypeScript

Let's say you have an API response with product data:

{
  "id": 456,
  "name": "Wireless Headphones",
  "price": 199.99,
  "inStock": true,
  "categories": ["Electronics", "Audio"],
  "specifications": {
    "brand": "TechCorp",
    "model": "WH-1000",
    "features": ["Noise Canceling", "Bluetooth 5.0"]
  }
}

After conversion, you'll get TypeScript interfaces like this:

interface Product {
  id: number;
  name: string;
  price: number;
  inStock: boolean;
  categories: string[];
  specifications: Specifications;
}

interface Specifications {
  brand: string;
  model: string;
  features: string[];
}


const product: Product = {
  id: 456,
  name: "Wireless Headphones",
  price: 199.99,
  inStock: true,
  categories: ["Electronics", "Audio"],
  specifications: {
    brand: "TechCorp",
    model: "WH-1000",
    features: ["Noise Canceling", "Bluetooth 5.0"]
  }
};

What is JSON to TypeScript Conversion? 🔄

JSON to TypeScript conversion transforms JSON data structures into TypeScript interfaces and type definitions. This process analyzes JSON structure and generates type-safe TypeScript code that provides compile-time checking, better IDE support, and improved code maintainability.

The generated TypeScript interfaces include proper type annotations, optional properties, and nested type definitions, making it easy to work with JSON data in a type-safe manner across React, Node.js, and other TypeScript applications.

Frequently Asked Questions

Does the tool generate proper TypeScript syntax?

Yes! The tool generates valid TypeScript interfaces with proper syntax, type annotations, and follows TypeScript best practices. The output is ready to use in any TypeScript project. You can validate your JSON first to ensure accuracy.

How are optional properties handled?

The tool analyzes your JSON structure and can generate optional properties using the TypeScript optional syntax (property?: type). You can configure whether properties should be optional or required based on your needs.

Can I use the generated types with React or Node.js?

Absolutely! The generated TypeScript interfaces work perfectly with React components, Node.js applications, Angular projects, and any other TypeScript-based framework or library.

How are arrays and nested objects handled?

The tool automatically creates separate interfaces for nested objects and properly types arrays (string[], number[], CustomType[], etc.). Complex nested structures and arrays of objects are fully supported.

Is the JSON to TypeScript conversion free?

Yes, completely free with no limitations on JSON complexity, file size, or conversion frequency. No registration required, and you can generate unlimited TypeScript interfaces from JSON data at no cost.