Making an FBX file Human Readable or Accessing it via an API

Does anybody know if there is a way to view the FBX file from the way it looks now in Notepad (looks compressed or like an executable) into something that is human readable? Is it a compressed format? I would like to make changes to the FBX file during import process, but, am at a loss how to start. Was hoping there was a way to do it like MTL files.

Short of being able to do this, does anyone know of where might be some documentation on how to access it via an API?

You can open an OBJ file in notepad.