Joplin is a free, open-source note-taking and to-do application. Notes are written in Markdown or a rich-text editor, organised in notebooks and searchable, and can include images, videos, PDFs, audio, math expressions and diagrams. A browser clipper for Chrome and Firefox saves web pages, Evernote exports can be imported, and plugins and themes extend the app. Apps are available for Windows, macOS, Linux, Android and iOS, plus a terminal app. Joplin is offline-first: notes stay on the device whether or not it is connected.
Notes can sync through Nextcloud, Dropbox, OneDrive or Joplin Cloud, a hosted service whose privacy policy states that it is owned by Joplin, registered in France. Synced notes can be protected with end-to-end encryption; the vendor says that not even the operators of Joplin Cloud can access such data. The policy does not state where Joplin Cloud data is stored. An organisation that wants full control over location can sync to a Nextcloud instance that it runs itself.