convert markdown to HTML in under 5kb
take a look at the to PHP translated version: https://github.com/SimonWaldherr/micromarkdown.php

about

License: MIT
Version: 0.3.4
Date: 10.2015

howto

browser

<script type="text/javascript" src="//simonwaldherr.github.io/micromarkdown.js/dist/micromarkdown.min.js"></script>

var input = document.getElementById('input').value,
    outputEle = document.getElementById('outEle');

outputEle.innerHTML = micromarkdown.parse(input);

node

install via npm

npm install micromarkdown

var mmd = require('micromarkdown');
console.log(mmd.parse('*foobar*\n**lorem** ***ipsum***\n\n* this\n* is a\n* list\n'));

or take a look at the nodemmd.js node example

node nodemmd.js

demo

Test this code on the associated github page simonwaldherr.github.io/micromarkdown.js/.
There is also a Testpage and a diff between the php and the js version.

contact

Feel free to contact me via eMail or on Twitter. This software will be continually developed. Suggestions and tips are always welcome.