Three sentences, no qualifiers:
- Drafts are stored on your device. The open document is kept in
localStorage; the library and its images live inIndexedDB. Both belong to this browser profile, not to an account. - There is no document API. The
/api/surface exists for billing and feature flags. It stores subscription state and flags — there is no endpoint that accepts a title or a paragraph. - Nothing is uploaded by default. The editor talks only to its own origin. The site's analytics count page visits; they never receive document text.