MJML

The desktop application provides an editor for creating responsive email layouts using the MJML markup language. It offers a live preview pane that renders the resulting HTML in real time and allows the user to resize the view to observe how the design adapts to different screen widths. Users can import and manage templates from the official library, edit them with syntax highlighting, and customize the environment to suit their workflow.

In addition to editing, the app integrates with a free Mailjet account to send test emails directly from the interface, enabling developers to verify the final output on various clients and devices. The built‑in support for all MJML components ensures that the full feature set of the markup language is available without additional configuration.

The project encourages community participation through a Slack channel and accepts contributions of new templates via pull requests, fostering a collaborative ecosystem around the tool. It is released under a free‑tier license and is considered stable for production use.