NAME

       idn - Internationalized Domain Names command line tool

SYNOPSIS

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

DESCRIPTION

       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

       --allow-unassigned
              Toggle IDNA AllowUnassigned flag (default off)

       --usestd3asciirules
              Toggle IDNA UseSTD3ASCIIRules flag (default off)

       --no-tld
              Don't  check  string  for  TLD  specific  rules  Only   for   --idna-to-ascii   and
              --idna-to-unicode

       -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

       --debug
              Print debugging information

       --quiet
              Silent operation

AUTHOR

       Written by Simon Josefsson.

REPORTING BUGS

       Report bugs to: help-libidn@gnu.org
       GNU Libidn home page: <https://www.gnu.org/software/libidn/>
       General help using GNU software: <https://www.gnu.org/gethelp/>

COPYRIGHT

       Copyright  ©  2022  Simon  Josefsson.   License  GPLv3+:  GNU  GPL  version  3  or   later
       <https://gnu.org/licenses/gpl.html>.
       This  is free software: you are free to change and redistribute it.  There is NO WARRANTY,
       to the extent permitted by law.

SEE ALSO

       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.