JSON to TypeScript Interface

Instantly convert JSON data into TypeScript interface definitions.

Root interface name

JSON Input

TypeScript Output

Features

Converts any valid JSON into TypeScript interfaces instantly
Supports nested objects and arrays
Handles optional fields and null values
Generates clean, readable TypeScript code
Runs entirely in your browser — no data sent to server

Use Cases

Rapidly creating type definitions when integrating a new REST API
Converting JSON response bodies from Postman/curl into TypeScript types
TypeScript project bootstrapping with typed data models

How to Use

Paste your JSON data into the input area on the left.
Click the 'Convert' button.
Copy the generated TypeScript interfaces from the output area.