Convert::uulib is a versatile and powerful decoder/encoder library for a variety of encodings used in usenet and mail (uuencode, xxencode, b64, binhex...).

the library contains a variety of heuristics to reliably decode any files found in the input files, whether part of a single mail folder or spread over hundreds of files. its two-pass architecture makes it possible to decode hundreds of megabytes in one sweep, without using much virtual memory.