Combine Html and Css into an email


Inline css into HTML or inline css into styletags for emails. You can then send files to Litmus for testing.

You can see an example setups below

Install this grunt plugin next to your project's grunt.js gruntfile with: npm install grunt-email-builder

Then add this line to your project's grunt.js gruntfile:


Place this in your grunt file.

emailBuilder: {
  test :{
    files : {
      'dest/ouput.html' : 'src/input.html'

To build your files dynamically

files : [{
  expand: true,
  src: ['**/*.html'],
  dest: 'dest/',

To prevent styles from being inlined, use the data-ignore attribute on embedded or external styles. Otherwise, all styles will be inlined. External styles with the data-ignore attribute will be embedded in their own <style> tag within the src document.

<!-- external styles -->
<link rel="stylesheet" data-ignore="ignore"  href="../css/style.css" />
<!-- embedded styles -->
<style data-ignore="ignore">
 /* styles here will not be inlined */


Can use any of the Juice options along with the ones below


Type: Object

Send yourself a test email

  emailTest : {
    // Your Email 
    email : '',
    // Your email Subject 
    subject : 'Email Subject',
    // Optional 
    transport: {
      type: 'SMTP',
      service: 'gmail',
      auth: {
        user: '',
        pass: 'gmailpass'

View nodmailer transport methods if using emailTest.transport option


Type: Object

Send email tests to Litmus

litmus : {
  // Optional, defaults to title of email or yyyy-mm-dd if title and options.subject not set 
  subject : 'Custom subject line',
  // Litmus username 
  username : 'username',
  // Litmus password 
  password : 'password',
  // Url to your Litmus account 
  url : '',
  // Email clients to test for. Find them at 
  // The <application_code> tags contain the name e.g. Gmail Chrome: <application_code> chromegmailnew </application_code> 
  applications : ['gmailnew', 'hotmail', 'outlookcom', 'ol2000', 'ol2002', 'ol2003', 'ol2007', 'ol2010','ol2011', 'ol2013', 'appmail6','iphone4', 'iphone5', 'ipad3']


Type: Boolean Default: false

If set to true, special characters will be encoded to their numerical value. e.g. © --> &#169;


Type: Number Default: 3500

Set the delay between each test

  inline: {
    files: { 'dest/output.html' : 'src/input.html' },
    options: {
      encodeSpecialChars: true
  litmus: {
    files: { 'dest/output.html' : 'src/input.html' },
    options: {
      encodeSpecialChars: true,
      litmus: {
        username: 'username',
        password: 'password',
        url: '',
        applications: ['gmailnew', 'ffgmail', 'chromegmail']
grunt.registerTask('inline', 'emailBuilder:inline');
grunt.registerTask('litmus', 'emailBuilder:litmus');
  • Make sure the latest Python 2.7.* is installed.
  • Right click on Computer/My Computer and go to Properties, go to Advanced System Settings, then Environment Variables.
  • Set the environment variable for "PYTHON" to where you installed Python27, eg C:\Python27\python.exe is the default.
  • If Visual Studio is not installed, install Visual Studio 2010. If you are using a later version of Visual Studio, eg 2012 or 2013, set the environment variable "GYP_MSVS_VERSION" to the corresponding version of Visual Studio.

If you're having issues with Litmus taking forever to load a test or the title of the test is showing up as "No Subject", it is most likely an issue with the Litmus API. You can check the Litmus status page to find out if their having any issues. If that's not the case, submit an issue and we'll look into further.

In lieu of a formal styleguide, take care to maintain the existing coding style. Add unit tests for any new or changed functionality. Lint and test your code using grunt.

Thanks for helping out:

Juice for compiling.


  • Can now pass in Juice options into options config
  • Using Bluebird promise lib instead of async lib
  • Link tags within conditional comments will be put into a style tag. Fixes #19
  • Added emailTest.transport option for users that might want to use a different transport method


  • Using juice2 which is an up-to-date version of juice
  • Removing options.doctype because juice2 handles this
  • Added options.delay
  • Added more logging information about a test. Fixes #16
  • Handles tests with duplicate names a little better by adding +1 to duplicate title


  • Send yourself a test email with options.emailTest
  • Update to grunt 4.4
  • Update Dependencies
  • Change gruntfile to coffeescript
  • 1.1.5 Allow options.litmus to run multiple tests
  • 1.1.0 Added options.doctype and options.encodeSpecialChars.
  • 1.0.0 Removed data-placement attribute in place of data-ignore. Improved options.litmus to send new versions of existing tests instead of creating new test.
  • 0.0.3 Inline css from style tags
  • 0.0.22 Bug Fixes
  • 0.0.2 Upgrade to grunt 0.4

Copyright (c) 2013 Steven Miller Licensed under the MIT license.