Is this conversion done on a server?

No. Type generation runs entirely in your browser.

Does it handle arrays of objects?

Yes. It infers array element types and merges object keys across items when possible.

New

Runs in browser

Convert JSON objects to TypeScript interfaces and types instantly. Free online JSON to TypeScript generator — no sign-up required.

JSON input

Files never leave your browser.

Drag and drop a file here, or tap to select

TypeScript output

export interface Root {
  "id": number;
  "meta": {
    "active": boolean;
  };
  "name": string;
  "tags": string[];
}

Paste JSON
Paste a JSON object or array into the input.
Review generated types
The TypeScript interface updates automatically as you type.
Copy the output
Use Copy types to copy the generated interface into your project.

Infer nested types and arrays.

Input

{"id":1,"user":{"name":"A"},"tags":["x"]}

Output

export interface Root { ... }

Is this conversion done on a server?: No. Type generation runs entirely in your browser.
Does it handle arrays of objects?: Yes. It infers array element types and merges object keys across items when possible.

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