Generate code

Create C#, Java, TypeScript and Python classes from JSON, YAML or XML.

Paste an API response and get typed classes for your project. Quap infers types from the values, merges the shapes of array items, and names nested classes after their keys. Code generation works from JSON, YAML and XML documents.

Steps

Open the document and click Conv in the preview toolbar.
Choose → C#, → Java, → TypeScript or → Python.
Set the options (below). The output updates as you change them.
Copy the code.

Options

Group	Options
Property	PascalCase names, Use fields instead of properties, Nullable primitives
Attributes	JsonProperty (Newtonsoft), NullValueHandling.Ignore, JsonPropertyName (.NET)
Class	Immutable classes, Record types
Lists	Readonly lists
Examples	Generate examples — adds a usage snippet that deserialises the document

Example

{ "id": 7, "customer": { "name": "Ada", "email": "ada@example.com" }, "tags": ["new"] }

export interface Customer {
  email: string;
  name: string;
}

export interface Root {
  customer: Customer;
  id: number;
  tags: string[];
}

Ask the AI assistant for the same thing in words: "generate TypeScript types for this document".