M-x markdown-preview-mode will open preview in a browser and will start markdown-mode if it's not yet running for current buffer. If you've closed the preview window, you can start it over with M-x markdown-preview-open-browser. All websockets will be cleaned up on emacs termination. If you'd like to perform cleanup manually run M-x markdown-preview-cleanup.

Multimarkdown

In order to enable multimarkdown support, customize M-x customize-option -> markdown-command variable. Look for Markdown Command which is set to markdown by default, set to multimarkdown and make sure it's in your PATH.

Browser

In order to select preferred browser, customize M-x customize-option -> browse-url-browser-function option. Select your browser from Value menu. If it's not there, follow EmacsWiki: Browse Url.

Stylesheets

Default theme for preview is Solarized-dark

Extra css are added with:

(add-to-list 'markdown-preview-stylesheets "https://raw.githubusercontent.com/richleland/pygments-css/master/emacs.css")

Override theme completely with:

(setq markdown-preview-stylesheets (list "http://thomasf.github.io/solarized-css/solarized-light.min.css"))

Extra javascript

If you'd like to include additional javascript for the preview, add this to your init:

(add-to-list 'markdown-preview-javascript "http://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-MML-AM_CHTML")

or, to make it async:

(add-to-list 'markdown-preview-javascript '("http://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-MML-AM_CHTML" . async))

Websocket port

Adjustable by M-x customize-option -> markdown-preview-port.

Installation

Melpa

Melpa recipe is available, so markdown-preview-mode is just a package-install away!

el-get

M-x el-get-self-update
M-x el-get-install -> markdown-preview-mode

Dependencies

Makes use of markdown-mode, which already can transform markdown into html and websocket.el to deliver html to browser.