JSON to TypeScript

Convert JSON data to TypeScript interfaces or types. Automatically infers types and generates nested interfaces.

Root Type Name

Use interface (vs type)

Export types

JSON Input

Paste your JSON data

TypeScript Output

Generated types

About JSON to TypeScript

This tool automatically converts JSON data into TypeScript type definitions. It analyzes the structure of your JSON and generates appropriate interfaces or types.

Automatically infers primitive types (string, number, boolean)
Creates nested interfaces for objects
Handles arrays with consistent item types
Supports both interface and type syntax
Optional export keyword for module usage