ContentImageByKey

→ string

Returns an HTML img element pointing at a Content Builder image identified by external key. Optionally supply a fallback key if the primary asset is missing.

Available in: Email CloudPage Automation Triggered Send

Syntax

Platform.Function.ContentImageByKey(key[, fallbackKey])

1–2 arguments

Parameters

Name	Type	Required	Description
`key`	string	Yes	External key of the image in Content Builder
`fallbackKey`	string	No	External key of a replacement image when the primary cannot be resolved

Return value

A string containing an img tag (including typical attributes such as src, alt, and title as provided by the platform).

Examples

var hero = Platform.Function.ContentImageByKey("hero-2026-campaign");
Write(hero);

var thumb = Platform.Function.ContentImageByKey("product-thumb", "product-thumb-default");
Write(thumb);