JSON to TypeScript Converter

JSON to TypeScript Converter turns JSON data into readable TypeScript interfaces or type aliases directly in your browser. It is useful when working with API responses, configuration files and structured JSON data in React, React Native, Node.js and other TypeScript projects.

What is a JSON to TypeScript converter?

A JSON to TypeScript converter analyzes the structure of JSON and generates TypeScript types that match the detected strings, numbers, booleans, arrays, objects and null values. This can save developers from manually writing repetitive interfaces for API responses.

How to convert JSON to TypeScript

1. Paste valid JSON into the input editor or load the example.
2. Choose a root type name and output format.
3. Adjust optional, nullable, readonly and export settings if needed.
4. Generate the TypeScript code.
5. Copy the result or download it as a .ts file.

Features

• Generate TypeScript interfaces or type aliases.
• Handle nested objects and arrays.
• Infer strings, numbers, booleans and null values.
• Optional-property and nullable-value controls.
• Readonly and export modifiers.
• Custom root type name.
• Copy and download generated TypeScript.
• JSON is processed locally in your browser.

Why use JSON to TypeScript for API responses?

Modern web applications frequently consume JSON APIs. Creating types from a representative API response helps developers get editor autocomplete, compile-time checks and clearer data contracts without manually describing every nested property.

JSON to TypeScript vs TypeScript interface

The converter is the generation tool; a TypeScript interface is one possible output. You can also generate a type alias when that syntax better fits your codebase.

Frequently asked questions