Returns the provided string using only uppercase 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
Uppercase(sourceString)
The Uppercase() function has one parameter:
sourceString(string): Required. The string to convert to uppercase.
Usage
To use the function, pass it a string.
%%[
Var @externalCustomerId
Set @externalCustomerId = "23df2d94c58ab"
]%%
<p>Your customer ID is %%=Uppercase(@externalCustomerId)=%%</p>
The example returns the string in all capital letters.
Your customer ID is 23DF2D94C58AB