Simply view any Markdown file on GitHub, then in your URL bar replace the github.com part of the URL with gitprint.com — your markdown file will be rendered to a beautiful, printable PDF.
Try an example (https://gitprint.com/jquery/jquery/blob/master/README.md)
Print Markdown from GitHub like you should have always been able to!
The GitPrint.com Chrome browser extension automatically inserts Markdown Print and Download buttons into the GitHub user interface. It's free, unobtrusive and quick to install.
Get the Chrome browser extension
If you're using a browser that supports it, you should be able to click and drag the bookmarklet below to your bookmark's or favorite's bar.
GitPrint this!