How to Encrypt & Decrypt FILES not just text?

Hey there,
As mentioned above, please guide me on how to Encrypt or Decrypt files like; pdf, mp3, mp4, etc.
Because the cryptography component just takes the input in text format. I tried searching this on community but was not convinced with the suggestions, like zipping and saving with password.
I do not know(and don’t want to) dig deep in encryption techniques because that would mislead me and cost me time.
Kindly help me guys.