mjmlio/mjml

MJML is a markup language and framework designed to simplify the creation of responsive emails by translating semantic MJML syntax into responsive HTML.

Email development traditionally requires extensive boilerplate code and careful handling of client-specific rendering quirks to achieve responsive layouts. MJML addresses this by providing a purpose-built markup language with a rich library of standard components that abstract away the complexity of email HTML. The framework's open-source engine handles the translation from MJML to production-ready responsive HTML, eliminating much of the manual work developers would otherwise need to do.

Teams building email campaigns or transactional emails should consider MJML if they want to reduce development time and simplify their email codebase. The framework works well for projects where responsive design across email clients is a priority. MJML can be used through multiple interfaces: an online editor requiring no installation, a command-line interface for local development, a Node.js API, or editor plugins for Visual Studio Code and Sublime Text, giving teams flexibility in how they integrate it into their workflow.

The project maintains a substantial base of outside users actively reporting issues and requesting features. Maintainers typically respond to new issues and pull requests within a day. Work in the issue tracker centers on beginner-focused topics, feature requests, and discussions, reflecting an active community engaged with the tool's development.