nkf

Network kanji filter: convert kanji code from one encoding to another. More information: https://manned.org/nkf.

nkf -w path/to/file.txt

nkf -s path/to/file.txt

nkf -w --overwrite path/to/file.txt

nkf -d --overwrite path/to/file.txt

nkf -c --overwrite path/to/file.txt

nkf -m --overwrite path/to/file.txt