$ go install github.com/goark/gnkf@latest 

$ gnkf -h Network Kanji Filter by Golang Usage: gnkf [flags] gnkf [command] Available Commands: base64 Encode/Decode BASE64 bcrypt Hash and compare by BCrypt completion Generate completion script dump Hexadecimal view of octet data stream enc Convert character encoding of the text guess Guess character encoding of the text hash Print or check hash value help Help about any command kana Convert kana characters in the text newline Convert newline form in the text norm Unicode normalization of the text remove-bom Remove BOM character in UTF-8 string version Print the version number width Convert character width in the text Flags: --debug for debug -h, --help help for gnkf Use "gnkf [command] --help" for more information about a command. 

$ gnkf guess -h Guess character encoding of the text Usage: gnkf guess [flags] Aliases: guess, g Flags: --all print all guesses -f, --file string path of input text file -h, --help help for guess Global Flags: --debug for debug $ echo こんにちは，世界 | gnkf guess --all UTF-8 windows-1255 windows-1253 Big5 GB-18030 Shift_JIS 

$ gnkf enc -h Convert character encoding of the text. Using MIME and IANA name as the character encoding name. Refer: http://www.iana.org/assignments/character-sets/character-sets.xhtml Usage: gnkf enc [flags] Aliases: enc, encoding, e Flags: -d, --dst-encoding string character encoding name of output text (default "utf-8") -f, --file string path of input text file -g, --guess guess character encoding of source text -h, --help help for enc -o, --output string path of output file -b, --remove-bom remove BOM character in source text (UTF-8 only) -s, --src-encoding string character encoding name of source text (default "utf-8") Global Flags: --debug for debug $ echo こんにちは，世界 | gnkf enc -g -d shift_jis | gnkf dump 0x82, 0xb1, 0x82, 0xf1, 0x82, 0xc9, 0x82, 0xbf, 0x82, 0xcd, 0x81, 0x43, 0x90, 0xa2, 0x8a, 0x45, 0x0a 

$ gnkf newline -h Convert newline form in the text. Usage: gnkf newline [flags] Aliases: newline, nwln, nl Flags: -f, --file string path of input text file -h, --help help for newline -n, --newline-form string newline form: [lf|cr|crlf] (default "lf") -o, --output string path of output file Global Flags: --debug for debug $ echo こんにちは，世界 | gnkf newline -n crlf | gnkf dump --unicode 0x3053, 0x3093, 0x306b, 0x3061, 0x306f, 0xff0c, 0x4e16, 0x754c, 0x000d, 0x000a 

$ gnkf norm -h Unicode normalization of the text (UTF-8 encoding only). Usage: gnkf norm [flags] Aliases: norm, normalize, nrm, nm Flags: -f, --file string path of input text file -h, --help help for norm -k, --kangxi-radicals normalize kangxi radicals only (with nfkc or nfkd form) -n, --norm-form string Unicode normalization form: [nfc|nfd|nfkc|nfkd] (default "nfc") -o, --output string path of output file -b, --remove-bom remove BOM character Global Flags: --debug for debug $ echo ﾍﾟﾝｷﾞﾝ | gnkf norm -n nfkc | gnkf dump --unicode 0x30da, 0x30f3, 0x30ae, 0x30f3, 0x000a 

$ echo ㈱埼⽟ | gnkf dump --unicode 0x3231, 0x57fc, 0x2f5f, 0x000a $ echo ㈱埼⽟ | gnkf norm -n nfkc -k | gnkf dump --unicode 0x3231, 0x57fc, 0x7389, 0x000a 

$ gnkf width -h Convert character width in the text (UTF-8 encoding only). Usage: gnkf width [flags] Aliases: width, wdth, w Flags: -c, --conversion-form string conversion form: [fold|narrow|widen] (default "fold") -f, --file string path of input text file -h, --help help for width -o, --output string path of output file -b, --remove-bom remove BOM character Global Flags: --debug for debug $ echo ペンギン | gnkf width -c narrow | gnkf dump --unicode 0xff8d, 0xff9f, 0xff9d, 0xff77, 0xff9e, 0xff9d, 0x000a 

$ gnkf kana -h Convert kana characters in the text. UTF-8 encoding only. "hiragana" and "katakana" forms are valid only for full-width kana character. Usage: gnkf kana [flags] Aliases: kana, k Flags: -c, --conversion-form string conversion form: [hiragana|katakana|chokuon] (default "katakana") -f, --file string path of input text file --fold convert character width by fold form -h, --help help for kana -o, --output string path of output file -b, --remove-bom remove BOM character Global Flags: --debug for debug $ echo こんにちは | gnkf kana -c katakana コンニチハ 

$ echo ニッポン | gnkf kana -c chokuon ニツポン 

$ gnkf base64 -h Encode/Decode BASE64. Usage: gnkf base64 [flags] Aliases: base64, b64 Flags: -d, --decode decode BASE64 string -f, --file string path of input text file -u, --for-url encoding/decoding defined in RFC 4648 -h, --help help for base64 -p, --no-padding no padding -o, --output string path of output file Global Flags: --debug for debug $ echo Hello World | gnkf b64 SGVsbG8gV29ybGQK $ echo SGVsbG8gV29ybGQK | gnkf b64 -d Hello World 

$ gnkf bcrypt -h Hash and compare by BCrypt. Usage: gnkf bcrypt [flags] string [string...] Aliases: bcrypt, bc Flags: --compare string compare to BCrypt hashed string -c, --cost int BCrypt cost (4-31) (default 10) -h, --help help for bcrypt Global Flags: --debug for debug $ gnkf bc password $2a$10$vvbBuQoVR9AFis6J4xtZ0espSfe976pZ1Em669nhdg2loAm2Yjxl2 $ gnkf bc --compare '$2a$10$vvbBuQoVR9AFis6J4xtZ0espSfe976pZ1Em669nhdg2loAm2Yjxl2' password compare BCrypt hashed string '$2a$10$vvbBuQoVR9AFis6J4xtZ0espSfe976pZ1Em669nhdg2loAm2Yjxl2' to... password : match! 

$ gnkf hash -h Print or check hash value. Support algorithm: MD5, SHA-1, SHA-224, SHA-256, SHA-384, SHA-512, SHA-512/224, SHA-512/256 Usage: gnkf hash [flags] [file] Aliases: hash, h Flags: -a, --algorithm string hash algorithm (default "SHA-256") -c, --check don't fail or report status for missing files -h, --help help for hash --ignore-missing don't fail or report status for missing files (with check option) --quiet don't print OK for each successfully verified file (with check option) Global Flags: --debug for debug $ echo Hello World | gnkf h d2a84f4b8b650937ec8f73cd8be2c74add5a911ba64df27458ed8229da804a26 - $ gnkf h hash/testdata/null.dat e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855 hash/testdata/null.dat $ gnkf h hash/testdata/null.dat | gnkf h -c hash/testdata/null.dat: OK 

$ gnkf remove-bom -h Remove BOM character in UTF-8 string. Usage: gnkf remove-bom [flags] Aliases: remove-bom, rbom, rb Flags: -f, --file string path of input text file -h, --help help for remove-bom -o, --output string path of output file Global Flags: --debug for debug $ echo Hello | gnkf dump 0xef, 0xbb, 0xbf, 0x48, 0x65, 0x6c, 0x6c, 0x6f, 0x0a $ echo Hello | gnkf remove-bom | gnkf dump 0x48, 0x65, 0x6c, 0x6c, 0x6f, 0x0a 

$ gnkf dump -h Hexadecimal view of octet data stream with C language array style. Usage: gnkf dump [flags] Aliases: dump, hexdump, d, hd Flags: -f, --file string path of input text file -h, --help help for dump -u, --unicode print by Unicode code point (UTF-8 only) Global Flags: --debug for debug $ echo ペンギン | gnkf dump 0xe3, 0x83, 0x9a, 0xe3, 0x83, 0xb3, 0xe3, 0x82, 0xae, 0xe3, 0x83, 0xb3, 0x0a $ echo ペンギン | gnkf dump --unicode 0x30da, 0x30f3, 0x30ae, 0x30f3, 0x000a