Inline CSS HTML Converter
I use the MailChimpAPI
At the moment i use the APi Version 2.0. MailChimp 2.0
How it works
The Encoding of the files must be UTF-8 and the FileFormat must be unix.
gem 'inline-css-html-converter',
git: 'https://github.com/Garllon/inline-css-html-converter.git'
require 'inline-css-html-converter'
InlineCssHtmlConverter::Worker.new(your_apikey, your_html).perform
License
InlineCssHtmlConverter is released under the MIT License.
In Progress(obsoleted)
At the moment i work on a version, which works with MailChimp 3.0.
MailChimp doesn't support this API endpoint any longer. :(