Markdown to Email HTML
Convert Markdown into production-ready Email HTML with real-time preview, compatibility checks, spam analysis, and multi-client simulation.
Enter Markdown on the left to preview your email
Markdown to Email HTML Converter
FormatList's Markdown to Email HTML converter generates production-ready email HTML with inline styles, table-based layouts, and automatic compatibility optimization. Unlike basic converters that only produce standard HTML, our tool wraps your content in an email-safe template that works across Gmail, Outlook, Apple Mail, and mobile clients.
Markdown vs Traditional Email HTML
| Feature | Markdown | Traditional HTML |
|---|---|---|
| Writing speed | Fast — plain text syntax | Slow — manual HTML tags |
| Learning curve | Minimal — intuitive syntax | Steep — requires HTML/CSS knowledge |
| Email compatibility | Requires conversion to inline styles | Direct control over inline styles |
| Version control | Excellent — plain text diffs | Messy — verbose HTML diffs |
| Responsive design | Automatic via converter | Manual implementation needed |
What makes Email HTML different?
- Inline styles — Every element gets explicit style attributes. Gmail strips
<style>tags and external stylesheets, so inline styles are essential for consistent rendering. - Table-based layout — Uses table elements with
role="presentation"for centering and structure. Tables are the most reliable layout method across all email clients. - Max-width 600px — Standard email content width that ensures readability on both desktop and mobile screens.
- No JavaScript or embeds — Strips scripts, iframes, and objects for security. Email clients block all active content.
- Responsive by default — Viewport meta tag and percentage-based widths ensure mobile-friendly display.
Gmail Compatibility Guide
Gmail is the most popular email client but also one of the most restrictive. It strips <style> tags, ignores external stylesheets, and limits CSS support. The key to Gmail compatibility is using inline styles for every element — which FormatList does automatically. Our converter applies styles directly to each HTML element, ensuring your formatting survives Gmail's filtering.
Gmail also supports a subset of CSS properties. Safe properties include color, font-size, font-weight, text-align, padding, margin, and border. Avoid relying on background-image or custom fonts in Gmail.
Outlook Compatibility Guide
Outlook desktop (Windows) uses Microsoft Word's rendering engine, making it the most challenging email client. It does not support Flexbox, CSS Grid, position: absolute/fixed, or CSS custom properties (variables). Our Compatibility Checker flags these issues automatically, and the generated HTML uses table-based layouts that work reliably in Outlook.
For best Outlook results: use table layouts, avoid CSS shorthand (e.g., use background-color instead of background), and always test with actual Outlook if your audience includes enterprise users.
Markdown to Email HTML — Frequently Asked Questions
How do I convert Markdown to Email HTML?
Type or paste your Markdown content into the editor on this page. FormatList automatically converts it to email-safe HTML with inline styles, a table-based responsive layout, and all the necessary components (DOCTYPE, viewport meta) for maximum email client compatibility.
Can Outlook render Markdown?
No. Outlook uses Microsoft Word's rendering engine, which does not support Markdown or modern CSS features like Flexbox and Grid. You must convert Markdown to HTML with inline styles for Outlook compatibility — which this tool does automatically.
Why does Gmail remove my CSS?
Gmail strips <style> tags and external stylesheets from email HTML for security and consistency. This is why inline styles are essential — all CSS must be applied directly to each HTML element via the style attribute. FormatList's converter handles this automatically.
How can I preview emails on mobile?
Use the Mobile preview mode in the Preview tab. You can switch between Desktop, Mobile, and Side-by-Side views. The preview simulates how your email will appear on iOS and Android email clients at 375px width.
How do I make email HTML responsive?
Use percentage-based widths, max-width containers, and responsive images (max-width: 100%). This tool generates a table-based layout with max-width: 600px by default. For advanced responsive patterns, use the mobile preview to verify behavior.
How do I reduce spam score?
Check the Spam Score tab for specific suggestions. Common fixes include: avoiding spam trigger words (like "BUY NOW", "ACT NOW"), maintaining a balanced text-to-link ratio, including an unsubscribe link, and avoiding excessive capitalization or punctuation.
Is my Markdown data sent to a server?
No. All Markdown-to-HTML conversion, preview rendering, compatibility checking, and spam analysis happens locally in your browser. Your content never leaves your computer.
What email clients does this tool support?
The generated HTML targets Gmail (web and mobile apps), Outlook (desktop and mobile), Apple Mail (desktop and iOS), Yahoo Mail, and most other major email clients. The Compatibility Checker tab identifies client-specific issues in your HTML.