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Dev tools · February 4, 2016

mjml.

The open source framework for responsive emails

mjml. launched on February 4, 2016 with 550 votes, #10 of 4,386 launches that month and more than 99% of that year's launches. The site was still online in September 2026, 10 years on.

Visit mjml.io ↗mjml. alternativestop 1% of February 2016

In plain words

MJML is an open source framework that simplifies creating responsive emails by using high-level components instead of complex code. It handles compatibility across email clients from Outlook 2003 to Gmail Inbox through conditional comments, media queries, and fallbacks. Designed for developers and email designers, MJML uses semantic syntax to make building and maintaining responsive emails more straightforward and less time-consuming.

written from the facts on this page · September 2026

From the sources

MJML leverages high level components to abstract the complexity of responsive email. It embeds all of the hacks needed to make emails responsive everywhere, from Outlook 2003 to Inbox by Gmail: conditional comments, media queries and fallbacks. Based on a semantic syntax, it’s very easy to learn, use and maintain.

The only framework that makes responsive email easy. MJML is a markup language designed to reduce the pain of coding a responsive email.

MJML is responsive by design on most-popular email clients, even Outlook. Write less code, save time and code more efficiently with MJML’s semantic syntax. “We decided to use MJML as the framework for our Figma Plugin due to its simplicity, support for a wide range of email clients, and component-based structure. It’s also a widely used and well-supported framework. We ❤️ you, MJML!” Write less code, save time and code more efficiently with MJML’s semantic syntax. MJML is responsive by design on most-popular email clients, even Outlook. Write high-level code thanks to reusable and extensible components. These days, we email everywhere - standing up, sitting down, sleeping...and on a ton of…from mjml.io

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