These days JSON is used a lot. For storing data, for storing settings, for describing other JSON files, and often for transporting information between server and client using DTOs (Data Transfer Objects). Recently I was monitoring the data transferred from one of my own Web API controllers to a mobile app. I discovered the amount of data transferred was way more then expected. This inspired me try to reduce the size of the transferred data. In this and following blog posts I will describe the different options you can use and combine. You can download the source code at the end of my article.