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JSON to TypeScript Generator

Generate TypeScript interfaces and types from a JSON sample locally.

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JSON sample

TypeScript

About

Infer readable TypeScript interfaces from JSON objects, arrays, primitives, null values, and property names that require quoting.

Key Features

  • Nested interfaces
  • Heterogeneous array unions
  • Quoted invalid identifiers
  • Copy and TypeScript download

How to use

  1. 1Choose a root type name.
  2. 2Paste a valid JSON sample.
  3. 3Generate, review, and copy or download the TypeScript.

Example

Input

{"user-name":"Ada","active":true}

Output

export interface RootObject {
  "user-name": string;
  active: boolean;
}

Limitations

  • Input is limited to 2,000,000 characters.
  • Fields are required because one sample cannot prove optionality.
  • Empty arrays become unknown[].

Last reviewed:

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