๐ŸงฌJSON to TypeScript

Generate TypeScript interfaces from JSON

About the JSON to TypeScript

JSON to TypeScript generates TypeScript interfaces from a JSON sample, inferring types for nested objects and arrays automatically.

It saves time when consuming APIs by giving you ready-to-use types. Everything is generated locally in your browser.

Common use cases

  • Creating types from API responses
  • Bootstrapping models for a new TypeScript project
  • Documenting the shape of JSON data
  • Catching type mismatches early in development

How to use the JSON to TypeScript

  1. Paste a representative JSON sample.
  2. Optionally set the root interface name.
  3. Copy the generated TypeScript interfaces.

Frequently asked questions

Does it handle nested objects and arrays?

Yes, nested objects become their own interfaces and arrays are typed by their element type.

What happens with mixed-type arrays?

It produces a union type covering the element types found in the array.

Is my JSON sent anywhere?

No, types are generated entirely in your browser.