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 IDN(1)                           idn 1.35                            IDN(1)
 User Commands                                                 User Commands

                                  May 2018

      idn - Internationalized Domain Names command line tool

      idn [,OPTION/]... [,STRINGS/]...

      Internationalized Domain Name (IDN) convert STRINGS, or standard

      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

      -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

           Toggle IDNA AllowUnassigned flag (default off)

           Toggle IDNA UseSTD3ASCIIRules flag (default off)

                                    - 1 -       Formatted:  January 20, 2019

 IDN(1)                           idn 1.35                            IDN(1)
 User Commands                                                 User Commands

                                  May 2018

           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'

           Print debugging information

           Silent operation

      Written by Simon Josefsson.

      Report bugs to:
      GNU Libidn home page: <>
      General help using GNU software: <>

      Copyright c 2018 Simon Josefsson.  License GPLv3+: GNU GPL version 3
      or later <>.
      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

           info idn

      should give you access to the complete manual.

                                    - 2 -       Formatted:  January 20, 2019