The latest version of Swift, Swift 5, has significantly upgraded the platform and development experience for Apple app developers. It provides benefits such as dynamic callable types, raw strings, strict null-correctness, and binary compatibility. The JSON format paired with Contentful enables developers to form the building blocks of platforms that are interoperable across frameworks and tech stacks. Swift 5 has an ability to deserialize JSON data, which involves converting the JSON data from a string format to a runtime representation of objects. This process is essential for delivering content to apps, websites, and other media using external APIs like Contentful's Content Delivery API. The article explores how developers can use Swift 5 to process JSON data, deserialize it, and render the results in their programs.