decodeURIComponent

decodeURIComponent(string encodedUriComponent)

Name	Description	Type	Default	Optional
encodedUriComponent		string		No

Decodes a url parameter.

var uriComponent = decodeURIComponent('%7B%22foo%22:%20%5B%22bar%22%5D%7D');
console.log(uriComponent);  // {"foo": ["bar"]}

JavaScript