MJML
MacSimplify Responsive Email Design for Developers
Overview
MJML is an open-source markup language built to ease responsive email design for developers. It replaces messy, client-specific HTML/CSS with clean, semantic syntax that compiles to optimized, cross-compatible email code. Say goodbye to fighting inconsistent rendering across Gmail, Outlook, Apple Mail, and more—MJML handles compatibility out of the box. It offers live previews, integrates with VS Code and other editors, and supports custom components for reusable templates. Ideal for teams crafting marketing, transactional, or newsletter emails, it cuts testing time and ensures designs look great everywhere.
Key Features
- Semantic markup for responsive emails
- Cross-client compatibility (Gmail, Outlook, Apple Mail)
- Live preview of email designs
- Code editor integrations (VS Code, Sublime)
- Custom component support for reusable templates
Top Alternatives
Foundation for Emails
Search Google
Handlebars (with email template libraries)
Search Google
Tool Info
Pros
- ⊕ Eliminates manual HTML/CSS hacks for email responsiveness
- ⊕ Saves time on testing across email clients
- ⊕ Open-source with active community support
Cons
- ⊖ Requires learning a simple but new syntax
- ⊖ Does not include email sending or analytics tools
- ⊖ Limited to email template design (not end-to-end email management)