JSON to TypeScript Converter

Generate TypeScript interfaces or type aliases from JSON samples.

JSON input

Emit as

Generated TypeScript

export interface Root {
  id: string;
  count: number;
  tags: string[];
  meta: Meta;
}

export interface Meta {
  createdAt: string;
  draft: boolean;
}

What is this tool?

Paste JSON and get TypeScript definitions that mirror the structure. Nested objects are emitted as separate named interfaces/types, and arrays keep element types. Choose interface or type alias output to match your codebase style.

How to use it

Paste a JSON sample (API response, config, fixture).
Choose interface or type emission.
Copy the generated TypeScript into your project and rename types as needed.

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