The file extension is the primary data format used by RPG Maker XP to store various game elements, ranging from character stats and map data to player save files. Because these files are binary-encoded using Ruby's Marshal serialization, they cannot be edited with standard text editors. Core Data Structure The .rxdata format is essentially a serialized Ruby object.
If a dedicated editor doesn't exist, you need to build a bridge. Here is the script you paste into a Ruby compiler (or the RPG Maker XP script editor) to read and manipulate your save file. save editor rxdata
To edit an RXDATA save file: