Unlike Bar Codes which directly convey readable ASCII characters, RFID tags do not. Instead, they convey Hex data strings that need to be converted back to readable ASCII characters. Also, there are numerous data structure templates that can be used to define what type of information is encoded, and in which order. What data structure you should use is largely dependent on what industry is going to use the RFID tag information.
This browser widget attempts to provide some insight as to the differences between these various RFID tag structures. It first provides a means of converting ASCII data to a single Hex string to be encoded, using the menus & input fields below. The initial version of this widget supports only DOD-96bit data structures. But more will be added over time.
Results: HEX data to encode into tag