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 IDN2(1)                    Libidn2 2.3.1.48-1925                    IDN2(1)
 User Commands                                                 User Commands

                                  July 2021



 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



                                    - 1 -           Formatted:  May 24, 2022






 IDN2(1)                    Libidn2 2.3.1.48-1925                    IDN2(1)
 User Commands                                                 User Commands

                                  July 2021



           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 2011-2021 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.

















                                    - 2 -           Formatted:  May 24, 2022