About the upgrade to text editing in Klaviyo's Drag and Drop editor
The short version: Your existing templates are not being deleted and your email content will not disappear. Most blocks upgrade automatically. For blocks with complex formatting, you’ll see a visual preview of both options and choose what works best - nothing changes without your input. You’ll receive at least 2-4 weeks notice via an in-app banner before anything changes on your account.
Overview
This upgrade moves Klaviyo’s text editing to a modern editor infrastructure that is more reliable, produces cleaner output, and handles copy-pasted content - from web pages, Google Docs, or other sources - without introducing stray formatting or hidden code. It also lays the groundwork for improvements to the editing experience across other block types going forward.
Like any infrastructure change, it involves trade-offs. Source code view, which was built into text blocks under the previous editor, cannot be carried forward in the same form. We’ve replaced it with dedicated tools - the Django Tag Builder and a standalone HTML block - that handle the same use cases with more precision. We recognize that’s a workflow change for some users, and the rest of this article explains what to expect.
Your email content and designs are fully preserved throughout this upgrade - nothing will be lost. The update moves your existing blocks into the new editor and converts custom styles to HTML to keep them looking the same. As part of this rollout, newly created templates will use the upgraded editor first, followed by a gradual migration of existing templates. This article explains what to expect at each stage.
What’s protected
- Your email content and designs are preserved throughout this process - either as a text block, table block, or split block, or as an HTML block.
- You can continue building and editing emails the same way you do today. The only difference is that text editing will no longer include source code view.
Stage 1: New templates
Starting in the next couple of weeks, any new email template you create will use the upgraded text editor for text blocks, table blocks, and split blocks. If you clone an existing template, the cloned template will inherit whichever editor the original was using.
You may notice a banner when opening a new template letting you know it’s using the new editor. This banner will be shown temporarily and removed after approximately one month.
If you have existing templates still on the old editor, they will continue to work the same as before until Stage 2 of the rollout reaches your account.
Stage 2: Existing templates
After Stage 1 is complete, Klaviyo will begin migrating existing templates that still use the old text editor. This rollout is gradual - you’ll receive at least 2-4 weeks of advance notice via an in-app banner before any changes are made to your account.
How conversion works
When migration reaches your account, Klaviyo will automatically attempt to convert each text block, table block, and split block in your existing templates:
- If the block can be converted - it will be upgraded to the new editor automatically, with no action required from you.
- If the block contains complex content - this applies to blocks with tables, custom styling, or embedded style tags. Rather than converting these automatically, Klaviyo will prompt you when you open one to edit it. You’ll see a side-by-side preview showing exactly what the block looks like with the upgrade applied versus preserved as an HTML block, so you can see any styling differences before committing. You choose which option works for your email - your content stays fully intact either way.
Note that this applies not just to text blocks, but also to split blocks and table blocks that use rich text editing.
Source code view
The new editor works by understanding content as structured data rather than raw code - the same approach that makes it more reliable, consistent, and better at handling copy-pasted content. Because of this, it can’t support arbitrary HTML editing directly inside a text block, which is why source code view can’t be carried forward in the same form.
Source code view is being replaced by two purpose-built tools that handle those use cases more cleanly. For direct HTML editing, a dedicated HTML block gives you full, unobstructed control over your code. For adding personalization and dynamic content using Django tags, the new Django Tag Builder lets you do this without writing code manually. These tools are more focused and reliable than the source code view embedded inside a text block.
What is changing
- Source code view in text, table, and split blocks is being replaced by the new Django Tag Builder for personalization tags, and a dedicated HTML block for direct code editing.
- Table and Split blocks will move to in-canvas text editing. You will no longer edit text in these blocks through the side panel.
What to expect during rollout
- Advance notice - You’ll receive at least 2–4 weeks of notice via an in-app banner before migration begins on your account.
- Gradual rollout - Migration will be rolled out gradually across accounts.
- Automatic conversion - Klaviyo will automatically convert your text blocks where possible.
- Your choice for complex blocks - Blocks with complex formatting won’t be changed automatically. When you open one to edit, a side-by-side preview lets you see both options and decide which to keep.
How to prepare
You don’t need to take any action before migration - your content will be preserved either way. That said, if you’d like to review your templates in advance:
- Standard text blocks will convert automatically with no action needed.
- Blocks with tables, custom styling, or embedded HTML won’t be converted automatically. When you open one to edit, you’ll see a side-by-side preview comparing the upgraded version against an HTML block that preserves your original styling exactly - and you decide which to keep.
If you’re unsure how a specific template will be affected, contact support - email support is available 24/7.