How to escape special characters in Oracle?

I have the following string that I’m trying to convert to UTF-8 :

Naïve file

I tried to convert it using Oracle :

UTL_URL.ESCAPE('Naïve file')

This returns Na%EFve%20file

Accoding to this converter, the result should be : Na%C3%AFve%20file (which is what I’m expecting)

Does any know how to fix that please ?

Thanks.

>Solution :

Default character in UTL_URL.ESCAPE set is ISO-8859-1.

Try UTL_URL.ESCAPE('Naïve file', TRUE, 'UTF-8')