What is MJML?
MJML is a markup language for email. You describe sections, columns, text and buttons, and it compiles to the table-based, inline-styled HTML that every inbox can display, with responsive layouts built in.
Going PostalFree tool
HTML to MJML, in one click
Paste the HTML of any email and get clean, responsive MJML back. No account needed.
0 KB of 100 KB · 3 free conversions a day
MJML
Paste an HTML email on the left and convert it. The MJML appears here, ready to copy.
Why convert HTML to MJML?
Hand-written email HTML is hard to edit safely. As MJML, the same email is short, readable and easy to change, and it compiles back to HTML that works in Gmail, Outlook and Apple Mail.
How does the conversion work?
An AI model reads your HTML and rewrites it as MJML, keeping your copy, links, images and colours. The result is compiled to check it's valid MJML before you see it, and fixed once if it isn't.
Is it free? Do you keep my HTML?
It's free with no account: 3 conversions a day per visitor. Your HTML is converted and sent back to you; it isn't saved.