JSON Tool

JSON to TypeScript Interface

Generate TypeScript interfaces from sample JSON, with optional properties inferred from arrays.

Runs in your browserJSON → TypeScript

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Example

Input

{"id":1,"tags":["a"],"owner":{"name":"Ada"}}

Output

export interface Root {
  id: number;
  tags: string[];
  owner: Owner;
}

export interface Owner {
  name: string;
}

How to use the JSON to TypeScript Interface

Paste or type your JSON into the input area, or open a file from your device.
Adjust the options above the editor if the tool offers any.
Review the TypeScript result, then copy it or download it as a file.

Privacy and limitations

Your data is processed on your device and is not uploaded to any server.

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