base64(1) - base64 encode/decode data and print to standard output 
-d, --decode
       decode data
 
-i, --ignore-garbage
       when decoding, ignore non-alphabet characters
 
-w, --wrap=COLS
       wrap encoded lines after COLS character (default 76).  Use 0 to disable line wrapping
 
--help display this help and exit
 
--version
       output version information and exit