NAME¶

idn - Internationalized Domain Names command line tool

SYNOPSIS¶

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

DESCRIPTION¶

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

AUTHOR¶

Written by Simon Josefsson.

REPORTING BUGS¶

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

COPYRIGHT¶

Copyright © 2024 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.

SEE ALSO¶

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.