JSON to TypeScript Interface Generator

Free online JSON to TypeScript converter. Paste JSON, get TypeScript interfaces instantly. Handles nested objects, arrays, optional fields. No signup, no upload.

JSON to TypeScript Generator

Paste JSON, get TypeScript interfaces instantly. Handles nested objects, arrays, optional fields. Free, no signup.

How to Use the JSON to TypeScript Interface Generator

  1. 1Paste a JSON sample — an object, array or API response.
  2. 2The TypeScript interfaces generate instantly with optional fields and arrays handled.
  3. 3Name the root interface and choose between interfaces and type aliases.
  4. 4Copy the generated types straight into your project.

Frequently Asked Questions