iconv-lite
Convert character encodings in pure javascript.
Last updated 5 months ago by ashtuchkin .
MIT · Repository · Bugs · Original npm · Tarball · package.json
$ cnpm install iconv-lite 
SYNC missed versions from official npm registry.

iconv-lite: Pure JS character encoding conversion

  • No need for native code compilation. Quick to install, works on Windows and in sandboxed environments like Cloud9.
  • Used in popular projects like Express.js (body_parser), Grunt, Nodemailer, Yeoman and others.
  • Faster than node-iconv (see below for performance comparison).
  • Intuitive encode/decode API, including Streaming support.
  • In-browser usage via browserify or webpack (~180kb gzip compressed with Buffer shim included).
  • Typescript type definition file included.
  • React Native is supported (need to install stream module to enable Streaming API).
  • License: MIT.

NPM Stats
Build Status npm npm downloads npm bundle size

Usage

Basic API

var iconv = require('iconv-lite');

// Convert from an encoded buffer to a js string.
str = iconv.decode(Buffer.from([0x68, 0x65, 0x6c, 0x6c, 0x6f]), 'win1251');

// Convert from a js string to an encoded buffer.
buf = iconv.encode("Sample input string", 'win1251');

// Check if encoding is supported
iconv.encodingExists("us-ascii")

Streaming API


// Decode stream (from binary data stream to js strings)
http.createServer(function(req, res) {
    var converterStream = iconv.decodeStream('win1251');
    req.pipe(converterStream);

    converterStream.on('data', function(str) {
        console.log(str); // Do something with decoded strings, chunk-by-chunk.
    });
});

// Convert encoding streaming example
fs.createReadStream('file-in-win1251.txt')
    .pipe(iconv.decodeStream('win1251'))
    .pipe(iconv.encodeStream('ucs2'))
    .pipe(fs.createWriteStream('file-in-ucs2.txt'));

// Sugar: all encode/decode streams have .collect(cb) method to accumulate data.
http.createServer(function(req, res) {
    req.pipe(iconv.decodeStream('win1251')).collect(function(err, body) {
        assert(typeof body == 'string');
        console.log(body); // full request body string
    });
});

Supported encodings

  • All node.js native encodings: utf8, ucs2 / utf16-le, ascii, binary, base64, hex.
  • Additional unicode encodings: utf16, utf16-be, utf-7, utf-7-imap, utf32, utf32-le, and utf32-be.
  • All widespread singlebyte encodings: Windows 125x family, ISO-8859 family, IBM/DOS codepages, Macintosh family, KOI8 family, all others supported by iconv library. Aliases like 'latin1', 'us-ascii' also supported.
  • All widespread multibyte encodings: CP932, CP936, CP949, CP950, GB2312, GBK, GB18030, Big5, Shift_JIS, EUC-JP.

See all supported encodings on wiki.

Most singlebyte encodings are generated automatically from node-iconv. Thank you Ben Noordhuis and libiconv authors!

Multibyte encodings are generated from Unicode.org mappings and WHATWG Encoding Standard mappings. Thank you, respective authors!

Encoding/decoding speed

Comparison with node-iconv module (1000x256kb, on MacBook Pro, Core i5/2.6 GHz, Node v0.12.0). Note: your results may vary, so please always check on your hardware.

operation             iconv@2.1.4   iconv-lite@0.4.7
----------------------------------------------------------
encode('win1251')     ~96 Mb/s      ~320 Mb/s
decode('win1251')     ~95 Mb/s      ~246 Mb/s

BOM handling

  • Decoding: BOM is stripped by default, unless overridden by passing stripBOM: false in options (f.ex. iconv.decode(buf, enc, {stripBOM: false})). A callback might also be given as a stripBOM parameter - it'll be called if BOM character was actually found.
  • If you want to detect UTF-8 BOM when decoding other encodings, use node-autodetect-decoder-stream module.
  • Encoding: No BOM added, unless overridden by addBOM: true option.

UTF-16 Encodings

This library supports UTF-16LE, UTF-16BE and UTF-16 encodings. First two are straightforward, but UTF-16 is trying to be smart about endianness in the following ways:

  • Decoding: uses BOM and 'spaces heuristic' to determine input endianness. Default is UTF-16LE, but can be overridden with defaultEncoding: 'utf-16be' option. Strips BOM unless stripBOM: false.
  • Encoding: uses UTF-16LE and writes BOM by default. Use addBOM: false to override.

UTF-32 Encodings

This library supports UTF-32LE, UTF-32BE and UTF-32 encodings. Like the UTF-16 encoding above, UTF-32 defaults to UTF-32LE, but uses BOM and 'spaces heuristics' to determine input endianness.

  • The default of UTF-32LE can be overridden with the defaultEncoding: 'utf-32be' option. Strips BOM unless stripBOM: false.
  • Encoding: uses UTF-32LE and writes BOM by default. Use addBOM: false to override. (defaultEncoding: 'utf-32be' can also be used here to change encoding.)

Other notes

When decoding, be sure to supply a Buffer to decode() method, otherwise bad things usually happen.
Untranslatable characters are set to � or ?. No transliteration is currently supported.
Node versions 0.10.31 and 0.11.13 are buggy, don't use them (see #65, #77).

Testing

$ git clone git@github.com:ashtuchkin/iconv-lite.git
$ cd iconv-lite
$ npm install
$ npm test
    
$ # To view performance:
$ node test/performance.js

$ # To view test coverage:
$ npm run coverage
$ open coverage/lcov-report/index.html

Current Tags

  • 0.4.0-pre3                                ...           bleeding (7 years ago)
  • 0.6.2                                ...           latest (5 months ago)

50 Versions

  • 0.6.2                                ...           5 months ago
  • 0.6.1                                ...           5 months ago
  • 0.6.0                                ...           6 months ago
  • 0.5.2                                ...           6 months ago
  • 0.5.1                                ...           10 months ago
  • 0.5.0                                ...           a year ago
  • 0.4.24                                ...           2 years ago
  • 0.4.23                                ...           3 years ago
  • 0.4.22                                ...           3 years ago
  • 0.4.21                                ...           3 years ago
  • 0.4.20                                ...           3 years ago
  • 0.4.19                                ...           3 years ago
  • 0.4.18                                ...           3 years ago
  • 0.4.17                                ...           4 years ago
  • 0.4.16                                ...           4 years ago
  • 0.4.15                                ...           4 years ago
  • 0.4.14                                ...           4 years ago
  • 0.4.13                                ...           5 years ago
  • 0.4.12                                ...           5 years ago
  • 0.4.11                                ...           5 years ago
  • 0.4.10                                ...           6 years ago
  • 0.4.9                                ...           6 years ago
  • 0.4.8                                ...           6 years ago
  • 0.4.7                                ...           6 years ago
  • 0.4.6                                ...           6 years ago
  • 0.4.5                                ...           6 years ago
  • 0.4.4                                ...           6 years ago
  • 0.4.3                                ...           6 years ago
  • 0.4.2                                ...           6 years ago
  • 0.4.1                                ...           6 years ago
  • 0.4.0                                ...           6 years ago
  • 0.4.0-pre3                                ...           7 years ago
  • 0.4.0-pre2                                ...           7 years ago
  • 0.4.0-pre                                ...           7 years ago
  • 0.2.11                                ...           7 years ago
  • 0.2.10                                ...           8 years ago
  • 0.2.9                                ...           8 years ago
  • 0.2.8                                ...           8 years ago
  • 0.2.7                                ...           8 years ago
  • 0.2.6                                ...           8 years ago
  • 0.2.5                                ...           8 years ago
  • 0.2.4                                ...           8 years ago
  • 0.2.3                                ...           8 years ago
  • 0.2.1                                ...           8 years ago
  • 0.2.0                                ...           9 years ago
  • 0.1.4                                ...           9 years ago
  • 0.1.3                                ...           9 years ago
  • 0.1.2                                ...           9 years ago
  • 0.1.1                                ...           9 years ago
  • 0.1.0                                ...           9 years ago
Maintainers (1)
Downloads
Today 17,856
This Week 441,022
This Month 1,745,500
Last Day 29,469
Last Week 444,148
Last Month 1,479,983
Dependencies (1)
Dev Dependencies (8)
Dependents (3024)

Copyright 2014 - 2016 © taobao.org |