Apple file formats are surprisingly easy to work with; many of the native apps use sqlite for storing data. I just looked into this for you, and it looks like n

Apple file formats are surprisingly easy to work with; many of the native apps use sqlite for storing data. I just looked into this for you, and it looks like notes are indeed stored in a sqlite db. On your Mac, you can find the notes in `~/Library/Containers/com.apple.Notes/Data/Library/Notes`. On mine there is a file called `NotesV6.storedata` that I can open in an sqlite browser. It should have everything you need.