Frontend Frameworks

MJML

Markup language for responsive email design

Status
Generally available
Last checked
Checked · Oct 16, 2026
License
Open source
Pricing
Free tier · from $0
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What it is

MJML is a markup language designed to simplify the creation of responsive emails. It abstracts away the complexities of HTML and CSS, making it easier for developers and designers to create consistent and visually appealing email templates.

MJML offers a streamlined and efficient way to create responsive emails by abstracting away the complexities of HTML and CSS, making it easier for developers and designers to focus on content rather than technical details.

When it fits — and when it doesn’t

A good fit for

  • Developers who need to create visually appealing and responsive email campaigns quickly

  • Teams that require a standardized approach to email design across multiple projects

Look elsewhere if

  • Projects requiring highly customized, non-responsive email designs

  • Users looking for a cloud-based solution with managed services

Known weaknesses

Each one links to the public issue, changelog or docs page it came from, where we have one.

  1. 01

    Limited integrations with popular email service providers

    MJML requires manual setup and integration with ESPs, lacking native support for many common platforms

  2. 02

    Performance issues when rendering complex templates

    Rendering large or nested MJML structures can lead to slower email generation times compared to raw HTML/CSS

  3. 03

    Small and less active community

    Limited third-party contributions, fewer plugins, and a smaller user base for support and collaboration

What it does well

  • Simplified markup for responsive email design

  • Automatic handling of email client quirks and inconsistencies

  • Extensive library of pre-built components

Pricing

Free tier
YesOpen source — free to use
Paid from
$0
Model
Flat rate
Enterprise plan
No

Pricing not independently confirmed — check the vendor’s page.

Performance benchmarks

How Fast Is It?

Set up MJML

Setup steps, common gotchas and what to check after 30 days.

Open the setup guide →