Custom HTML Block

The custom HTML block lets you add custom HTML code directly to your emails. This is useful for advanced customization and adding elements unavailable through other blocks.

How It Works

Add the block by clicking the plus icon and selecting “Custom HTML”. You can:

Write or paste HTML code
Preview how it renders
Switch between code and preview modes
Edit code in full-width view

Email Client Compatibility

When using custom HTML, keep in mind:

Email clients strip out JavaScript
External stylesheets aren’t supported
CSS support varies widely between clients
Use inline styles for consistent rendering
Some HTML5 elements aren’t supported
Tables are often necessary for layout

Tips

Test extensively across email clients
Use tables for complex layouts
Keep CSS inline
Avoid JavaScript completely
Use simple, well-supported HTML tags
Consider mobile responsiveness
Back up custom code before editing

Related Guides

Heading Block
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Paragraph Block
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Image Block
Use the image block to display images in your email newsletter.
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List Block
The list block helps you create ordered (numbered) and unordered (bullet) lists in your emails.
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Button Block
The button block displays eye-catching calls to action in your emails.
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Social Icons Block
The social icons block helps you add social media links to your emails.
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Table Block
The table block lets you organize content into rows and columns.
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Section Block
The section block is a container that helps you group and style related content.
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Columns Block
The columns block helps you create multi-column layouts in your emails.
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Spacer Block
The spacer block creates vertical spacing between other blocks in your email.
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Separator Block
The separator block adds a horizontal line to visually divide content in your email.
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Custom HTML Block

In this article

How It Works

Email Client Compatibility

Tips

Related Guides

Heading Block

Paragraph Block

Image Block

List Block

Button Block

Social Icons Block

Table Block

Section Block

Columns Block

Spacer Block

Separator Block

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