JSON to TypeScript Generator

Paste JSON and generate TypeScript interfaces instantly. Free tool for developers.

JSON to TypeScript

Paste JSON and generate TypeScript interfaces. Invalid JSON will show a clear error.

Paste or type valid JSON. Objects and arrays are supported.

Quick examples:

TypeScript output

Generated interfaces from your JSON. The top-level type is named Root—rename it to match your data (e.g. User, ApiResponse).

Enter JSON and click Generate to see the TypeScript output here.

What is this tool?

This generator converts JSON input into TypeScript interfaces. Use it when you receive API responses, config files, or sample data and need type-safe interfaces for your codebase.

How to use

  1. Paste or type JSON into the input area.
  2. Click Generate to convert it to TypeScript.
  3. Copy the output and paste it into your project.

Example

Input: {"id": 1, "name": "Laptop", "price": 1200}

Output: interface Root { id: number; name: string; price: number; }

FAQ

Does it support nested objects?

Yes. JSON with nested objects and arrays will produce corresponding TypeScript interfaces and types.

Can I use arrays?

Yes. Arrays of objects produce types like Root[]. Rename the top-level type to match your domain (e.g. User, ApiResponse).

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