nkf ☆
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Description:
Network Kanji code conversion Filter (NKF)
Type: Formula  |  Tracked Since: Dec 28, 2025
Links: Homepage  |  formulae.brew.sh
Category: Developer tools
Tags: encoding japanese text-processing conversion utility
Install: brew install nkf
About:
NKF (Network Kanji Filter) is a comprehensive character encoding converter primarily designed for Japanese text. It automatically detects and converts between various character encodings including ISO-2022-JP, EUC-JP, Shift_JIS, and UTF-8. The tool is particularly valuable for handling legacy Japanese text data and ensuring proper display across different systems.
Key Features:
  • Automatic encoding detection for Japanese text
  • Support for multiple encodings (ISO-2022-JP, EUC-JP, Shift_JIS, UTF-8)
  • MIME encoding/decoding capabilities
  • Line ending conversion
  • Robust handling of mixed encoding files
Use Cases:
  • Converting legacy Japanese text files to modern UTF-8 encoding
  • Processing email messages with Japanese character sets
  • Fixing mojibake (garbled text) in Japanese documents
  • Batch conversion of files for web publishing
Alternatives:
  • iconv – Standard Unix tool, less specialized for Japanese text detection
  • uconv – ICU-based converter, more heavyweight but supports more languages
Version History
Detected Version Rev Change Commit
Sep 10, 2025 6:43pm 0 VERSION_BUMP 325db2ec
Sep 11, 2024 12:46am 0 VERSION_BUMP 576222df
Aug 6, 2024 11:01pm 0 VERSION_BUMP 2b055ec1
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