Open XX File
The XX format and extension files are 7-bit ASCII text files encoded with specialized encoding and made under a method known as XXEncoding, which uses only alphanumeric characters and signs, to a lesser extent, and was developed by ConeXware, Inc.
XX files are a means of transferring files intact or undamaged, similar to UU files under UUEncoded.
The format became obsolete as most programs now do not require files to be encrypted, thus allowing binary file transfers.
For working with XX files, the most popular program for handling XX files is ConeXware's PowerArchiver.
XXEncoded XX files are compatible with XXE files and can use that file extension as well.
Programs that open XX files are, below: