I wrote a OneNote export tool for the web browser for my personal migration to Joplin.
It creates either (i) a zip file with directories corresponding to sections containing HTML notes and embedded resources/images or (ii) an Evernote ENEX file.
So far only tested with my account (~100MB), so it is experimental.
- No scribbles/pen drawings as the API does not expose those
- Some resources/image in ENEX file have not been recognized by Evernote or Joplin during import, so maybe there is still a bug
It is open source and data stays completely in the user's browser.
Let me know if this is useful or broken.