About MJML.ai
MJML.ai is an online MJML editor and AI email builder for people who need responsive email code they can inspect and edit. Start with a written brief, an existing template, or HTML that needs a more maintainable structure.
From a brief to editable email code
Describe an email, optionally choose a template and brand profile, then generate MJML and preview the compiled HTML. You can edit the code, copy it, or download the output for your email platform.
For existing code, the repair workflow accepts MJML or HTML, shows a fix summary and validation results, and lets you compare the output. The HTML-to-MJML workflow helps turn legacy email markup into editable MJML.
Tools for the final QA pass
Browse free MJML templates, measure exported markup with the free email size checker, and work through the email development checklist.
AI output and a browser preview still need review. Test the final email in the inbox clients your audience uses, confirm links and accessibility, and check the message after your sending platform adds its own markup.
MJML and MJML.ai
MJML is the open-source markup language used to compile responsive email HTML. MJML.ai adds an AI generation and repair workflow around that markup. It is an email creation tool; you export the result to your own sending platform.