HTML Email Template Builder

An HTML email template is a structured HTML document designed specifically for email clients. Unlike web pages, email HTML must follow strict compatibility rules because email clients (like Gmail, Outlook, Apple Mail) use different rendering engines than web browsers. Most email clients strip out or ignore modern CSS features, JavaScript, and external stylesheets.

Creating email-safe HTML requires using table-based layouts instead of CSS Grid or Flexbox, inline CSS instead of external stylesheets, and web-safe fonts instead of custom web fonts. Our HTML email template builder automatically generates code that follows these best practices, ensuring your emails render correctly across all major email clients.

<div class="container">
  <div class="flex">
    <h1>Hello</h1>
  </div>
</div>
<style>
  .container { max-width: 600px; }
</style>

<table width="600" style="max-width: 600px;">
  <tr>
    <td style="padding: 20px;">
      <h1 style="margin: 0;">Hello</h1>
    </td>
  </tr>
</table>

Key Differences from Web HTML

• •Table-Based Layouts: Email clients don't support CSS Grid or Flexbox reliably. Tables provide the most consistent layout structure.
• •Inline CSS: External stylesheets and <style> tags are often stripped. All styles must be inline using the style attribute.
• •Web-Safe Fonts: Custom web fonts (@font-face) don't work in emails. Use system fonts like Arial, Helvetica, Georgia, or Times New Roman.
• •No JavaScript: Email clients strip out all JavaScript for security reasons. All interactivity must be handled server-side.
• •Limited CSS Support: Many CSS properties (like position: fixed, animations, transitions) don't work in emails. Stick to basic styling.

According to Can I Email, email client CSS support varies widely. Outlook uses Microsoft Word's rendering engine, which has limited CSS support. Gmail strips out many CSS properties. Our HTML email template builder generates code that works across these differences.

Modern email marketing platforms like Mailchimp, Campaign Monitor, and SendGrid use similar table-based, inline CSS approaches. Our tool lets you build the same email-safe HTML code without needing a platform subscription.