1IDN(1)                           User Commands                          IDN(1)
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NAME

6       idn - Internationalized Domain Names command line tool
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SYNOPSIS

9       idn [OPTION]... [STRINGS]...
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DESCRIPTION

12       Internationalized Domain Name (IDN) convert STRINGS, or standard input.
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14       Command line interface to the internationalized domain name library.
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16       All strings are expected to be encoded in the preferred charset used by
17       your locale.  Use --debug to find out what this charset  is.   You  can
18       override the charset used by setting environment variable CHARSET.
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20       To  process a string that starts with '-', for example '-foo', use '--'
21       to signal the end of parameters, as in: idn --quiet -a -- -foo
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23       Mandatory arguments to long options are  mandatory  for  short  options
24       too.
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26       -h, --help
27              Print help and exit
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29       -V, --version
30              Print version and exit
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32       -s, --stringprep
33              Prepare string according to nameprep profile
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35       -d, --punycode-decode
36              Decode Punycode
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38       -e, --punycode-encode
39              Encode Punycode
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41       -a, --idna-to-ascii
42              Convert to ACE according to IDNA (default mode)
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44       -u, --idna-to-unicode
45              Convert from ACE according to IDNA
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47       --allow-unassigned
48              Toggle IDNA AllowUnassigned flag (default off)
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50       --usestd3asciirules
51              Toggle IDNA UseSTD3ASCIIRules flag (default off)
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53       --no-tld
54              Don't   check   string   for   TLD   specific   rules  Only  for
55              --idna-to-ascii and --idna-to-unicode
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57       -n, --nfkc
58              Normalize string according to Unicode v3.2 NFKC
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60       -p, --profile=STRING
61              Use specified stringprep profile instead Valid  stringprep  pro‐
62              files: Nameprep iSCSI Nodeprep Resourceprep trace SASLprep
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64       --debug
65              Print debugging information
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67       --quiet
68              Silent operation
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AUTHOR

71       Written by Simon Josefsson.
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REPORTING BUGS

74       Report bugs to: help-libidn@gnu.org
75       GNU Libidn home page: <http://www.gnu.org/software/libidn/>
76       General help using GNU software: <https://www.gnu.org/gethelp/>
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79       Copyright © 2021 Simon Josefsson.  License GPLv3+: GNU GPL version 3 or
80       later <https://gnu.org/licenses/gpl.html>.
81       This is free software: you are free  to  change  and  redistribute  it.
82       There is NO WARRANTY, to the extent permitted by law.
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SEE ALSO

85       The  full  documentation for idn is maintained as a Texinfo manual.  If
86       the info and idn programs are properly installed at your site, the com‐
87       mand
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89              info idn
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91       should give you access to the complete manual.
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95GNU Libidn 1.38                    July 2021                            IDN(1)
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