How to Format JSON in TypeScript

TypeScript, being a superset of JavaScript, uses the native JSON.stringify() method to format JSON. Given its typed advantages, you can also assert schemas via Interfaces or Types before formatting.

Example Code

interface User {
  name: string;
  age: number;
  city: string;
  skills: string[];
}

const user: User = {
  name: "John",
  age: 30,
  city: "New York",
  skills: ["TypeScript", "React"]
};

// JSON.stringify takes 3 arguments: (value, replacer, space)
const formattedJson: string = JSON.stringify(user, null, 2);

console.log(formattedJson);

Common Use Cases

• Formatting frontend request payloads for terminal debugging
• Displaying JSON in UI components
• Saving deeply structured typed configurations