Node.js module to generate URL slugs. Another one? This one cares about i18n and transliterates non-Latin scripts to conform to the RFC3986 standard. Mostly API-compatible with similar modules.

npm install limax
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(Yet another) Node.js module to generate URL slugs, also known as clean URLs, user-friendly URLs and SEO-friendly URLs.

The difference?

This module includes Romanisation of non-Latin scripts. Give it a string of text in pretty much any major world language and it will convert it to valid characters, conforming to RFC3986, for use within the path element of a URL.

Currently supports, but not limited to, the following scripts:

  • Latin: e.g. English, français, Deutsch, español, português
  • Cyrillic: e.g. Русский язык, български език, українська мова
  • Chinese: e.g. 官话, 吴语 (converts to Latin script using tone number Pinyin)
  • Japanese: e.g. ひらがな, カタカナ (converts to Romaji using Hepburn)

Based on number of npm downloads, the most popular Node.js module for generating slugs is slug, which claims it "slugifies even utf-8 chars!" You may be pleased to discover that all characters in a utf-8 encoded string are "utf-8 chars"!

This module depends on the speakingurl module and remains mostly API-compatible with both it and the more popular slug module.

If you already use either the speakingurl or slug modules, you can probably swap in limax without changing the logic in your code.

Oh, and limax is the Latin word for slug.


npm install limax


var slug = require("limax");


var latin = slug("i ♥ latin"); // i-love-latin
var cyrillic = slug("Я люблю русский"); // ya-lyublyu-russkij
var pinyin = slug("我爱官话"); // wo3-ai4-guan1-hua4
var romaji = slug("私は ひらがな が大好き"); // ha-hiragana-gaki

slug(text, options)


  • replacement: char to replace whitespace with, defaults to - (provides API compatibility with the slug module)
  • separator: equivalent to replacement (provides API compatibility with the speakingurl module)
  • lang: ISO 639-1 two-letter language code, defaults to auto-detected language
var strich = slug("Ich ♥ Deutsch", {lang: "de"}); // ich-liebe-deutsch
var unterstreichen1 = slug("Ich ♥ Deutsch", {lang: "de", replacement: "_"}); // i_liebe_deutsch
var unterstreichen2 = slug("Ich ♥ Deutsch", {lang: "de", separator: "_"}); // i_liebe_deutsch

slug(text, replacement)

Provided to support backwards-compatibility with the slug module.

var underscore = slug("i ♥ unicode", "_"); // i_love_unicode

Test Build Status

Run the unit tests with:

npm test


Pull requests with mappings and tests for further scripts and languages are more than welcome.


Copyright 2013 Lovell Fuller

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

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