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JSON to TypeScript Interface Generator

Convert JSON to TypeScript interfaces or types online – nested objects, arrays, optional fields and union types generated automatically.

Developer Tools Free Private

JSON

TypeScript

What is the JSON to TypeScript Generator?

Paste a JSON response from an API and instantly get TypeScript interfaces (or type aliases) that describe it – including nested objects, arrays of objects, optional fields (when they are missing in some array items), nullable values and mixed types.

It saves time when typing API data in React, Next.js, Angular and Node.js projects.

How to use the JSON to TypeScript Generator

  1. Paste JSON (an object or array).
  2. Set the root name and choose interface or type.
  3. Copy the generated TypeScript.

Tips

  • Use a real API response with several array items so optional fields are detected correctly.
  • Rename generated interfaces to match your project naming.

This JSON to TypeScript Generator is 100% free, needs no signup and runs privately in your browser – on phone, tablet or computer.

Last updated: · By NodifyTech

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