Lowercase()

Returns the provided string using only lowercase letters.

Marketing Cloud Engagement	✅ Yes
Marketing Cloud Next	✅ Yes

This function became available in Marketing Cloud Next during the Summer ’26 release (API version 67.0).

The Lowercase() function has one parameter:

• sourceString (string): Required. The string that you want to convert to lowercase characters.

To use the function, pass it a string that you want to convert to lowercase characters.

The example outputs the lowercase string.