Is there any way to encrypt a save?

Right now I'm using JSON to create a file with save data in it, however all the data is in plain text. Wondering if there is a method of encrypt the file to prevent save editing?

I recommend @rexrainbow 's XOR encryption.

You encrypt and decrypt with a password.
In your case, you could choose anything, just make sure to minify the script, so no-one can read the password from your sourcefiles.

Exactly what I was looking for, thank you so much!