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Macで文字化けしているファイルの文字コードを変更する

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受け取った txt ファイルが文字化けてるー!!そんな時

nkf コマンドを使いましょう。
Mac では Homebrew を使うとインストールできます。

インストール方法

$ brew install nkf

実行方法

例えば、文字化けしている hoge.txt を UTF-8 で表示させるとき

$ nkf -w hoge.txt

オプションで文字コードの指定を変更できる。以下参照。

$ nkf --help
Usage:  nkf -[flags] [--] [in file] .. [out file for -O flag]
 j/s/e/w  Specify output encoding ISO-2022-JP, Shift_JIS, EUC-JP
          UTF options is -w[8[0],{16,32}[{B,L}[0]]]
 J/S/E/W  Specify input encoding ISO-2022-JP, Shift_JIS, EUC-JP
          UTF option is -W[8,[16,32][B,L]]
 m[BQSN0] MIME decode [B:base64,Q:quoted,S:strict,N:nonstrict,0:no decode]
 M[BQ]    MIME encode [B:base64 Q:quoted]
 f/F      Folding: -f60 or -f or -f60-10 (fold margin 10) F preserve nl
 Z[0-4]   Default/0: Convert JISX0208 Alphabet to ASCII
          1: Kankaku to one space  2: to two spaces  3: HTML Entity
          4: JISX0208 Katakana to JISX0201 Katakana
 X,x      Convert Halfwidth Katakana to Fullwidth or preserve it
 O        Output to File (DEFAULT 'nkf.out')
 L[uwm]   Line mode u:LF w:CRLF m:CR (DEFAULT noconversion)
 --ic=<encoding>        Specify the input encoding
 --oc=<encoding>        Specify the output encoding
 --hiragana --katakana  Hiragana/Katakana Conversion
 --katakana-hiragana    Converts each other
 --{cap, url}-input     Convert hex after ':' or '%'
 --numchar-input        Convert Unicode Character Reference
 --fb-{skip, html, xml, perl, java, subchar}
                        Specify unassigned character's replacement
 --in-place[=SUF]       Overwrite original files
 --overwrite[=SUF]      Preserve timestamp of original files
 -g --guess             Guess the input code
 -v --version           Print the version
 --help/-V              Print this help / configuration
Network Kanji Filter Version 2.1.3 (2013-11-22)
Copyright (C) 1987, FUJITSU LTD. (I.Ichikawa).
Copyright (C) 1996-2013, The nkf Project.

これで、文字コード変えて表示したり、元ファイルの文字コードを変えて保存したりできる。

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