MJML 4

Introduction

MJML is a markup language created by Mailjet and designed to reduce the pain of coding a responsive email. Its semantic syntax makes it easy and straightforward while its rich standard components library fastens your development time and lightens your email codebase. MJML’s open-source engine takes care of translating the MJML you wrote into responsive HTML.

Installation

You can install MJML with NPM to use it with NodeJS or the Command Line Interface. If you're not sure what those are, head over to Usage for other ways to use MJML.

npm install mjml

Usage

Online

Don't want to install anything? Use the free online editor!

Applications and plugins

MJML comes with an ecosystem of tools and plugins, check out:

• The MJML App (MJML is included)
• Visual Studio Code plugin (MJML is included)
• Atom plugin (MJML needs to be installed separately)
• Sublime Text plugin (MJML needs to be installed separately)

For more tools, check the Community page.

Command line interface

Compiles the file and outputs the HTML generated in output.html

mjml input.mjml -o output.html

You can pass optional arguments to the CLI and combine them.

argument | description | default value ---------|--------|-------------- mjml -m [input] | Migrates a v3 MJML file to the v4 syntax | NA mjml [input] -o [output] | Writes the output to [output] | NA mjml [input] -s | Writes the output to stdout | NA mjml -w [input] | Watches the changes made to [input] (file or folder) | NA mjml [input] --config.beautify | Beautifies the output (true or false) | true mjml [input] --config.minify | Minifies the output (true or false) | false

See mjml-cli documentation for more information about config options.

Inside Node.js

import mjml2html from 'mjml'

/*
  Compile an mjml string
*/
const htmlOutput = mjml2html(`
  <mjml>
    <mj-body>
      <mj-section>
        <mj-column>
          <mj-text>
            Hello World!
          </mj-text>
        </mj-column>
      </mj-section>
    </mj-body>
  </mjml>
`, options)


/*
  Print the responsive HTML generated and MJML errors if any
*/
console.log(htmlOutput)

You can pass optional options as an object to the mjml2html function:

option | unit | description | default value -------------|--------|--------------|--------------- fonts | object | Default fonts imported in the HTML rendered by HTML | See in index.js keepComments | boolean | Option to keep comments in the HTML output | true ignoreIncludes | boolean | Option to ignore mj-includes | false beautify | boolean | Option to beautify the HTML output | false minify | boolean | Option to minify the HTML output | false validationLevel | string | Available values for the validator: 'strict', 'soft', 'skip' | 'soft' filePath | string | Path of file, used for relative paths in mj-includes | '.' preprocessors | array of functions | Preprocessors applied to the xml before parsing. Input must be xml, not json. Functions must be (xml: string) => string | [] juicePreserveTags | Preserve some tags when inlining css, see mjml-cli documentation for more info | NA minifyOptions | Options for html minifier, see mjml-cli documentation for more info | NA mjmlConfigPath | string | The path or directory of the .mjmlconfig file (for custom components use) | process.cwd() useMjmlConfigOptions | Allows to use the config attribute from .mjmlconfig file | false

Note that it's also possible to define preprocessors in your mjmlconfig file. For this, you need to use a .mjmlconfig.js file. This js file needs to export an Object with the same structure as a standard JSON .mjmlconfig file.

API

A free-to-use MJML API is available to make it easy to integrate MJML in your application. Head over here to learn more about the API.

MJML Slack

MJML wouldn't be as cool without its amazing community. Head over the Community Slack to meet fellow MJML'ers.