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IDN(1)                           User Commands                          IDN(1)


idn - Internationalized Domain Names command line tool


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


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


Written by Simon Josefsson.


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


Copyright (C) 2021 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.


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. GNU Libidn 1.38 July 2021 IDN(1)

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