What is the use of GSON in Android? Gson is a Java library that can be used to convert Java Objects into their JSON representation. It can also be used to convert a JSON string to an equivalent Java object. Gson can work with arbitrary Java objects including pre-existing objects that you do not have source-code.What is difference between JSON and GSON in Android? GSON is a java API from Google that converts java objects to their JSON representations and vice-versa. Installation instructions and sample usage here. Google Gson is a simple Java-based library to serialize Java objects to JSON and vice versa. It is an open-source library developed by Google.Why do we use GSON? Overview. Google's Gson library provides a powerful framework for converting between JSON strings and Java objects. This library helps to avoid needing to write boilerplate code to parse JSON responses yourself. It can be used with any networking library, including the Android Async HTTP Client and OkHttp.Why do we use GSON? Overview. Google's Gson library provides a powerful framework for converting between JSON strings and Java objects. This library helps to avoid needing to write boilerplate code to parse JSON responses yourself. It can be used with any networking library, including the Android Async HTTP Client and OkHttp.Is GSON better than Jackson? Gson 1.6 now includes a low-level streaming API and a new parser which is actually faster than Jackson. Adding to other answers already given above. If case insensivity is of any importance to you, then use Jackson. Gson does not support case insensitivity for key names, while jackson does.