Sumi

Cloudflare Email Builder

Blocks

Click to add to email

Inspector

Select a block to edit properties

Export

JSON

HTML

Send Email

From

Must be a verified sending domain in SparkPost

To (recipients)

Comma-separated email addresses

Subject

Content

HTML will be generated from your current email design

Settings

SparkPost Integration

Checking configuration...

Secure API Key Storage

Your SparkPost API key is stored as an encrypted Cloudflare secret — it is never exposed to the browser or stored in code.

To configure or update your API key, run:

npx wrangler pages secret put SPARKPOST_API_KEY --project-name=email-editor

Optional — set a default from address:

npx wrangler pages secret put DEFAULT_FROM_ADDRESS --project-name=email-editor

Email Defaults

Default From Address

Saved locally. Overridden by server-side DEFAULT_FROM_ADDRESS secret if set.

Default Subject Prefix

Layout Defaults

Canvas Color

Backdrop Color

Import HTML

Paste your HTML email template below. The editor will parse it into blocks.