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JSON to TypeScript Converter

Generate TypeScript interfaces from JSON data instantly.
Paste your JSON and get type-safe TypeScript code.

Error: Unexpected end of JSON input

How it works

Type Inference

Automatically infers types from JSON values: string, number, boolean, null

Nested Objects

Creates separate interfaces for nested objects automatically. Each nested object gets its own named interface.

Arrays

Handles arrays of primitives and objects. Creates item interfaces for arrays of objects and infers types for primitive arrays.