What is jsonexport?

JSONExport is a free Mac application that takes a JSON object (a common way to structure data from websites and apps) and automatically writes the code for it in your preferred programming language. Instead of manually typing out dozens of lines of code to define how your app should handle data from an API, you paste in the JSON, and the tool generates ready-to-use model classes with all the necessary setup methods. The app works as a straightforward converter. You provide a valid JSON object, and it reads the structure to figure out what properties each class needs. You can customize the output before saving: you pick the target language, rename the root class, add a prefix to all generated classes, or choose whether to include constructors and helper methods that turn the data back into a dictionary format. You can also preview everything before exporting. It supports a wide range of languages and frameworks, including Java variants for Android, Swift classes and structures, and Objective-C for iOS and Mac. This tool is built for mobile developers who regularly work with web APIs and want to skip the tedious, repetitive task of writing data models by hand. For example, if you are building an iOS app that pulls tweets from Twitter's API, you would paste the timeline JSON into the app and instantly get Swift or Objective-C classes ready to store that tweet data in your app. It is especially handy for projects that use specific data libraries like Realm or SwiftyJSON, since it can generate code tailored to those frameworks. There are some practical limitations to keep in mind. The tool cannot handle empty values in your JSON, struggles with deeply nested arrays, and has known issues when generating code for certain database frameworks like CoreData and Realm. In those cases, you may need to manually fix type mismatches or fill in default values after exporting. It is an open-source project built in Swift, and the creator notes it is still in an early stage of development.