More and more Ajax developers are choosing JSON for their data transfer instead of XML. Although XML has been the pillar of Ajax (X is for XML), JSON has become the choice of most developers because it was particularly built for JavaScript. Compared to XML, JSON is lighter and will work faster compared to XML. This lightweight function enables Ajax based websites and applications to run faster. The reason why JSON is very efficient in data transmission is its ability to function in itself. By this function we mean that JSON has the ability to �EXECUTE� without the aid of other functions. XML is only a format which will be used to transmit data and files, but JSON is very effective in terms self execution.