Can I add custom HTML code to an email?

Flodesk does not support adding or embedding custom HTML code into emails. This is an intentional product decision to protect email deliverability, design consistency, and the subscriber experience across devices and inbox providers.

This article explains why custom HTML isn’t supported and what you can do instead to achieve advanced designs and functionality—without writing code.

Flodesk was built to help you design beautiful, high-converting emails without needing to write or manage code. Our visual editor and patent-pending Layout Blocks handle the complex technical work behind the scenes.

Allowing custom HTML could:

• Break layouts across different email clients and devices

• Interfere with Flodesk’s rendering technology

• Reduce deliverability or trigger spam filters

• Create inconsistent experiences for subscribers

To avoid these issues, and to keep your emails reliable and conversion-focused, Flodesk does not allow custom HTML to be embedded in emails.

While you can’t add custom HTML, you still have powerful options to design engaging emails using native Flodesk features:

• Layout Blocks to build custom visual structures and graphics

• Image blocks to add designed elements created in external tools

• Native countdown timers for launches and promotions

• Poll blocks to collect feedback and increase engagement

• Pre-designed templates for welcome emails, newsletters, and campaigns

These tools are fully supported, tested across devices, and optimized for deliverability.

The following are examples of things that cannot be added using custom HTML in Flodesk emails:

• Embedded scripts or JavaScript

• Third-party widgets that require HTML embed codes

• Custom tracking pixels added via raw HTML

• Advanced animations or interactions that rely on code

If a feature requires pasting HTML code, it is not supported inside Flodesk emails.

• Custom HTML code cannot be embedded in Flodesk emails

• This ensures consistent design, better deliverability, and reliable rendering

• Flodesk provides powerful no-code tools to create high-impact emails

• Most common design and engagement goals can be achieved without HTML

Can I paste HTML code into an email block?
No. Flodesk does not support pasting or embedding custom HTML code in any email block.

Why does Flodesk restrict custom HTML?
To prevent display issues across email clients, protect deliverability, and ensure emails render consistently on desktop and mobile devices.

Can I embed third-party widgets or scripts using HTML?
No. Scripts, widgets, and embeds that rely on HTML or JavaScript are not supported in emails.

Is there a workaround to add HTML features?
There is no supported workaround for embedding HTML. Instead, use Flodesk’s native features like Layout Blocks, images, polls, and countdown timers.

Can I design elements elsewhere and use them in Flodesk?
Yes. You can design visuals in external tools (such as image or design editors), export them as images, and upload them into your email using image blocks.

Will Flodesk support custom HTML in the future?
There’s no current plan to support custom HTML. You can submit feature requests here: https://updates.flodesk.com/b/j0x71evq/feature-ideas