iconv [options] [-f from-encoding] [-t to-encoding] [inputfile]...
The iconv program reads in text in one encoding and outputs the text in
another encoding. If no input files are given, or if it is given as a
dash (-), iconv reads from standard input. If no output file is given,
iconv writes to standard output.
If no from-encoding is given, the default is derived from the current
locale’s character encoding. If no to-encoding is given, the default
is derived from the current locale’s character encoding.