Provided by: idn_1.33-2.2ubuntu2_amd64 bug


       idn - Internationalized Domain Names command line tool


       idn [OPTION]... [STRINGS]...


       Internationalized Domain Name (IDN) convert STRINGS, or standard input.

       Command line interface to the internationalized domain name library.

       All  strings are expected to be encoded in the preferred charset used by your locale.  Use
       `--debug' to find out what this charset is.  You can override the charset used by  setting
       environment variable CHARSET.

       To  process  a string that starts with `-', for example `-foo', use `--' to signal the end
       of parameters, as in `idn --quiet -a -- -foo'.

       Mandatory arguments to long options are mandatory for short options too.

       -h, --help
              Print help and exit

       -V, --version
              Print version and exit

       -s, --stringprep
              Prepare string according to nameprep profile

       -d, --punycode-decode
              Decode Punycode

       -e, --punycode-encode
              Encode Punycode

       -a, --idna-to-ascii
              Convert to ACE according to IDNA (default mode)

       -u, --idna-to-unicode
              Convert from ACE according to IDNA

              Toggle IDNA AllowUnassigned flag (default off)

              Toggle IDNA UseSTD3ASCIIRules flag (default off)

              Don't  check  string  for  TLD  specific  rules  Only   for   --idna-to-ascii   and

       -n, --nfkc
              Normalize string according to Unicode v3.2 NFKC

       -p, --profile=STRING
              Use  specified  stringprep  profile  instead Valid stringprep profiles: `Nameprep',
              `iSCSI', `Nodeprep', `Resourceprep', `trace', `SASLprep'

              Print debugging information

              Silent operation


       Written by Simon Josefsson.


       Report bugs to:

       Report Debian bugs to:
       GNU Libidn home page: <>
       General help using GNU software: <>

       Packaged by Debian (1.33-2.2ubuntu2)
       Copyright © 2016 Simon Josefsson.
       License GPLv3+: GNU GPL version 3 or later <>.
       This is free software: you are free to change and redistribute it.
       There is NO WARRANTY, to the extent permitted by law.


       The full documentation for idn is maintained as a Texinfo manual.  If  the  info  and  idn
       programs are properly installed at your site, the command

              info idn

       should give you access to the complete manual.