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JSON → TypeScript Interface

Generate TypeScript interfaces from JSON. All processing happens in your browser.

Paste your JSON
Enter JSON to generate TypeScript interface definitions. Nested objects become separate interfaces.

Convert JSON to TypeScript

This tool generates TypeScript interfaces from JSON data. When you receive JSON from an API or config file, you need proper types for your TypeScript or React code. Instead of writing interfaces by hand, paste your JSON and get ready-to-use interfaces with correct types for strings, numbers, arrays, and nested objects.

How to Generate TypeScript from JSON

  1. Paste your JSON string into the input box. It can be minified or formatted.
  2. Optionally set a root interface name (e.g., "User", "ApiResponse").
  3. Click "Convert" to generate TypeScript interfaces. Copy the output into your project.

Why Use a JSON to TypeScript Converter?

Typed code catches errors earlier and improves IDE autocomplete. This JSON to TypeScript generator handles nested objects, arrays, and optional fields. It creates separate interfaces for each nested structure. Perfect for API responses, config files, or any JSON you need to type in React, Node.js, or Angular projects.