How do you convert a JSON string to a JavaScript object?

JSON.parse() deserialises a JSON string back into a usable JavaScript object.

let personJSON = '{"name":"Muster","vorname":"Hans"}';

let person = JSON.parse(personJSON);

// "Muster"
console.log(person.name);
// "Hans"
console.log(person.vorname);

Important: JSON.parse() throws an exception if the JSON is invalid!

try {
    let data = JSON.parse(invalidJSON);
} catch (e) {
    console.error("Invalid JSON:", e.message);
}

Common use cases:

• Receiving API responses
• Reading from localStorage
• Processing configuration files

Tip: Always wrap JSON.parse() in try-catch when parsing user input or external data.