Returns the provided string using only lowercase letters.
Availability
<table> <tr> <td>Marketing Cloud Engagement</td> <td>✅ Yes</td> </tr> <tr> <td>Marketing Cloud Next</td> <td>✅ Yes</td> </tr> </table>This function became available in Marketing Cloud Next during the Summer ’26 release (API version 67.0).
Syntax
Lowercase(sourceString)
The Lowercase() function has one parameter:
sourceString(string): Required. The string that you want to convert to lowercase characters.
Usage
To use the function, pass it a string that you want to convert to lowercase characters.
%%[
Var @email, @emailNormalized
Set @email = "TOMAS.SANTOS@EXAMPLE.com"
Set @emailNormalized = Lowercase(@email)
]%%
<p>The email address is %%=v(@emailNormalized)=%%.</p>
The example outputs the lowercase string.
The email address is tomas.santos@example.com.