1IDN2(1)                          User Commands                         IDN2(1)
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NAME

6       idn2 - Libidn2 Internationalized Domain Names conversion tool
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SYNOPSIS

9       idn2 [OPTION]... [STRINGS]...
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DESCRIPTION

12       The  idn2  tool converts DNS domains from UTF-8 to ASCII compatible en‐
13       coding (ACE) form, as used in the DNS protocol. The encoding format  is
14       the Internationalized Domain Name (IDNA2008/TR46) format.
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16       Internationalized  Domain  Name (IDNA2008) convert STRINGS, or standard
17       input.
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19       Command line interface to the Libidn2 implementation of IDNA2008.
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21       All strings are expected to be encoded in the locale charset.
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23       To process a string that starts with `-', for example `-foo', use  `--'
24       to signal the end of parameters, as in `idn2 --quiet -- -foo'.
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26       Mandatory  arguments  to  long  options are mandatory for short options
27       too.
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29       -h, --help
30              Print help and exit
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32       -V, --version
33              Print version and exit
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35       -d, --decode
36              Decode (punycode) domain name
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38       -l, --lookup
39              Lookup domain name (default)
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41       -r, --register
42              Register label
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44       -T, --tr46t
45              Enable TR46 transitional processing
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47       -N, --tr46nt
48              Enable TR46 non-transitional processing
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50       --no-tr46
51              Disable TR46 processing
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53       --usestd3asciirules
54              Enable STD3 ASCII rules
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56       --no-alabelroundtrip
57              Disable A-label roundtrip for lookups
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59       --debug
60              Print debugging information
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62       --quiet
63              Silent operation
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AUTHOR

66       Written by Simon Josefsson, Tim Ruehsen.
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REPORTING BUGS

69       Report bugs to: help-libidn@gnu.org
70       Libidn2 home page: <https://www.gnu.org/software/libidn/#libidn2>
71       General help using GNU software: <https://www.gnu.org/gethelp/>
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74       Copyright © 2011-2021 Simon Josefsson, Tim  Ruehsen.   License  GPLv3+:
75       GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>.
76       This  is  free  software:  you  are free to change and redistribute it.
77       There is NO WARRANTY, to the extent permitted by law.
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SEE ALSO

80       idn(1)
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82       The full documentation for idn2 is maintained as a Texinfo manual.   If
83       the  info  and  idn2  programs are properly installed at your site, the
84       command
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86              info idn2
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88       should give you access to the complete manual.
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92Libidn2 2.3.1.48-1925              July 2021                           IDN2(1)
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