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IDN2(1)                          User Commands                         IDN2(1)


idn2 - Libidn2 Internationalized Domain Names conversion tool


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


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


Written by Simon Josefsson, Tim Ruehsen.


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 (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.


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)

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