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All extensions are available from @react-email/editor/extensions and are included in StarterKit by default. Each can be configured via StarterKit.configure() or imported individually.

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Body

Email body wrapper element.
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HTMLAttributes
Record<string, any>
Extra HTML attributes applied to the body element.

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Section

Content section container.
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HTMLAttributes
Record<string, any>
Extra HTML attributes applied to the section element.

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Div

Generic div container.
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HTMLAttributes
Record<string, any>
Extra HTML attributes applied to the div element.

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Paragraph

Text paragraph.
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HTMLAttributes
Record<string, any>
Extra HTML attributes applied to the paragraph element.

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Heading

Heading levels 1–6.
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levels
number[]
default:"[1, 2, 3, 4, 5, 6]"
Which heading levels to enable.
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HTMLAttributes
Record<string, any>
Extra HTML attributes applied to the heading element.

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Blockquote

Block quote element.
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HTMLAttributes
Record<string, any>
Extra HTML attributes applied to the blockquote element.

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CodeBlockPrism

Code block with Prism.js syntax highlighting.
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defaultLanguage
string | null
Default language for syntax highlighting.
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HTMLAttributes
Record<string, any>
Extra HTML attributes applied to the code block element.

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Divider

Horizontal rule / separator.
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HTMLAttributes
Record<string, any>
Extra HTML attributes applied to the hr element.

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Button

Email button (styled anchor element).
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HTMLAttributes
Record<string, any>
Extra HTML attributes applied to the button element.

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PreviewText

Email preview text (shown in inbox list views).

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BulletList

Unordered list.
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HTMLAttributes
Record<string, any>
Extra HTML attributes applied to the ul element.

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OrderedList

Ordered (numbered) list.
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HTMLAttributes
Record<string, any>
Extra HTML attributes applied to the ol element.

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ListItem

Individual list item.
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HTMLAttributes
Record<string, any>
Extra HTML attributes applied to the li element.

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TwoColumns

Two column layout container. Inserts two ColumnsColumn children.

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ThreeColumns

Three column layout container. Inserts three ColumnsColumn children.

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FourColumns

Four column layout container. Inserts four ColumnsColumn children.

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ColumnsColumn

Individual column within a column layout. Automatically created by column insertion commands.

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Table

Table container.
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HTMLAttributes
Record<string, any>
Extra HTML attributes applied to the table element.

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TableRow

Table row.
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HTMLAttributes
Record<string, any>
Extra HTML attributes applied to the tr element.

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TableCell

Table cell.
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HTMLAttributes
Record<string, any>
Extra HTML attributes applied to the td element.

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TableHeader

Table header cell.

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Bold

Bold text formatting.
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HTMLAttributes
Record<string, any>
Extra HTML attributes applied to the strong element.

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Italic

Italic text formatting.
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HTMLAttributes
Record<string, any>
Extra HTML attributes applied to the em element.

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Strike

Strikethrough text formatting.
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HTMLAttributes
Record<string, any>
Extra HTML attributes applied to the s element.

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Underline

Underline text formatting.
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HTMLAttributes
Record<string, any>
Extra HTML attributes applied to the u element.

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Code

Inline code formatting.
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HTMLAttributes
Record<string, any>
Extra HTML attributes applied to the code element.

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Sup

Superscript text.
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HTMLAttributes
Record<string, any>
Extra HTML attributes applied to the sup element.

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Uppercase

Uppercase text transform.
Hyperlink with extended email attributes.
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openOnClick
boolean
default:"false"
Whether clicking a link navigates to the URL. Disabled by default in the editor.
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HTMLAttributes
Record<string, any>
Extra HTML attributes applied to the a element.

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Text

Base text node. Required for any text content.

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AlignmentAttribute

Adds text alignment support (left, center, right) to block nodes.
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types
string[]
Node types that support alignment.

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StyleAttribute

Adds inline CSS style support to nodes.

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ClassAttribute

Adds CSS class name support to nodes.

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Placeholder

Shows placeholder text when the editor is empty.
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placeholder
string | ((node) => string)
Placeholder text or function returning placeholder text.
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includeChildren
boolean
default:"true"
Whether to show placeholders in child nodes.

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PreservedStyle

Preserves inline formatting when unlinking text.

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GlobalContent

Stores metadata (like custom CSS) that persists in the document but isn’t visible. Used by the serializer to inject global styles.

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MaxNesting

Enforces a maximum nesting depth for the document.
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maxDepth
number
Maximum allowed nesting depth.
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nodeTypes
string[]
Node types to enforce the nesting limit on.

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HardBreak

Line break within a block (Shift+Enter).