Welcome to the Make community!
You can try using the built-in function toBinary
e.g.:
tobinary(1.Base64EncodedString)
If it isn’t base64 encoded, you can convert it to base64 first.
base64(1.plaintext)
For more information, see the function documentation in the Help Center.
Hope this helps! Let me know if there are any further questions or issues.
— @samliew
P.S.: Did you know, the concepts of about 70% of questions asked on this forum are already covered in the Make Academy. Investing some effort into it will save you lots of time and frustration using Make later!