Convert64, a base64 encoder, for Mac OS X has been revved to version 2.1.0. The app lets you determine what type a file is, encode or decode base 64 files, embed image data into the HTML of your website, and more.
Convert64 2.1.0 sports Retina display support as well as performance tweaks and bug fixes. It requires a 64-bit Mac running Mac OS X 10.6 or higher.
Convert64 2.1.0 costs US$2.99 and available worldwide exclusively through the App Store in the Utilities category. Go to http://www.45rpmsoftware.com/convert64.php for more info.