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IDN2(1)                          User Commands                         IDN2(1)

NAME
       idn2 - Libidn2 Internationalized Domain Names conversion tool

SYNOPSIS
       idn2 [OPTION]... [STRINGS]...

DESCRIPTION
       The idn2 tool converts DNS domains from UTF-8 to ASCII compatible
       encoding (ACE) form, as used in the DNS protocol. The encoding format
       is the Internationalized Domain Name (IDNA2008/TR46) format.

       Internationalized Domain Name (IDNA2008) convert STRINGS, or standard
       input.

       Command line interface to the Libidn2 implementation of IDNA2008.

       All strings are expected to be encoded in the locale charset.

       To process a string that starts with `-', for example `-foo', use `--'
       to signal the end of parameters, as in `idn2 --quiet -- -foo'.

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

       -h, --help
              Print help and exit

       -V, --version
              Print version and exit

       -d, --decode
              Decode (punycode) domain name

       -l, --lookup
              Lookup domain name (default)

       -r, --register
              Register label

       -T, --tr46t
              Enable TR46 transitional processing

       -N, --tr46nt
              Enable TR46 non-transitional processing

       --no-tr46
              Disable TR46 processing

       --usestd3asciirules
              Enable STD3 ASCII rules

       --no-alabelroundtrip
              Disable A-label roundtrip for lookups

       --debug
              Print debugging information

       --quiet
              Silent operation

AUTHOR
       Written by Simon Josefsson, Tim Ruehsen.

REPORTING BUGS
       Report bugs to: help-libidn@gnu.org
       Libidn2 home page: <https://www.gnu.org/software/libidn/#libidn2>
       General help using GNU software: <https://www.gnu.org/gethelp/>

COPYRIGHT
       Copyright (C) 2011-2022 Simon Josefsson, Tim Ruehsen.  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
       idn(1)

       The full documentation for idn2 is maintained as a Texinfo manual.  If
       the info and idn2 programs are properly installed at your site, the
       command

              info idn2

       should give you access to the complete manual.

Libidn2 2.3.4                   September 2023                         IDN2(1)