MJML 4

If you're looking for MJML 3.3.X check this branch

Translated documentation

Language	Link for documentation
日本語	日本語ドキュメント

Introduction

MJML is a markup language created by Mailjet and designed to reduce the pain of coding a responsive email. Its semantic syntax makes the language easy and straightforward while its rich standard components library shortens 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

Development

To work on MJML, make changes and create merge requests, download and install yarn for easy development.

git clone https://github.com/mjmlio/mjml.git && cd mjml
yarn
yarn build

You can also run yarn build:watch to rebuild the package as you code.

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)
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 MJML	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 `options` attribute from `.mjmlconfig` file	false

Client-side (in browser)

var mjml2html = require('mjml-browser')

/*
  Compile a mjml string
*/
var 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)

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.

Contributors

Language

Link for documentation

日本語

日本語ドキュメント

argument

description

default value

mjml -m [input]

Migrates a v3 MJML file to the v4 syntax

mjml [input] -o [output]

Writes the output to [output]

mjml [input] -s

Writes the output to stdout

mjml -w [input]

Watches the changes made to [input] (file or folder)

mjml [input] --config.beautify

Beautifies the output (true or false)

true

mjml [input] --config.minify

Minifies the output (true or false)

false

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)

option

unit

description

default value

fonts

object

Default fonts imported in the HTML rendered by MJML

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

minifyOptions

Options for html minifier, see mjml-cli documentation for more info

mjmlConfigPath

string

The path or directory of the .mjmlconfig file (for custom components use)

process.cwd()

useMjmlConfigOptions

Allows to use the options attribute from .mjmlconfig file

false

var mjml2html = require('mjml-browser') /* Compile a mjml string */ var 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)