Showdown
A bidirectional Markdown to HTML to Markdown converter in Javascript
...Showdown can be used client side (in the browser) or server side (with nodejs). See it working in the live demo! No hard dependencies or special installation instructions! Just download it (or use a CDN) and include it in your file. Out of the box, supports a number of popular markdown flavors like "vanilla", GFM or commonmark. Extra features like tables, metadata, etc., can be enabled through options. Showdown works both in server (nodejs) and client-side (browser). It's easily customizable and extendable, meaning you can add new syntax or modify it's behavior through extensions or options. ...