MJML App is a multi-platform and open-source desktop application designed to act as a live editor for the MJML markup language, which is the only framework to make responsive-email easy.
The application works on all major platforms, including GNU/Linux, macOS, and Microsoft Windows, and allows users to create responsive emails easily and quickly, which contain a live preview that can be viewed on both mobile and desktop.
It is composed of a template manager that lets you create your own template gallery right on your local environment, live reload capability for automatic reloading of your template whenever you take a break from writing, as well as Gist integration so you can export your template in a gist that can be shared anywhere.
Additionally, MJML App features the ability to send test emails using a Mailjet account, and support for themes, allowing for high-customization of your environment by selecting the look and feel that you like the most (can be enabled in the Setting tab of the editor).
System requirements
