idn2 (1) Linux Manual Page
NAME
idn2 – Libidn2 Internationalized Domain Names conversion tool
SYNOPSIS
idn2 [OPTION]… [STRINGS]…
DESCRIPTION
idn2 tool converts DNS domains from UTF-8 to ASCII compatibile encoding (ACE) form, as used in the DNS protocol. The encoding format is the Internationalized Domain Name (IDNA2008/TR46) format.
All input 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- Prints help and exits.
-V, –version- Prints version and exits.
-d, –decode- Decode an ACE name according to IDNA2008.
-l, –lookup- Encode to ACE according to IDNA2008 (the default).
-r, –register- Registers a label.
-T, –tr46t- Enable TR#46 transitional processing.
-N, –tr46nt- Enable TR#46 non-transitional processing (default).
–no-tr46- Disable TR#46 processing.
–usestd3asciirules- Enable STD3 ASCII rules.
–debug- Prints debugging information.
–quiet- Silent operation.
Author
Written by Simon Josefsson.
Reporting bugs
Report bugs to the gitlab issue tracker of the project https://gitlab.com/libidn/libidn2/issues.