Joplin is a free, open source note-taking and to-do application available on Windows, macOS, Linux, Android and iOS, with a terminal app also offered. Its documentation describes Joplin as "offline first," meaning users always have all their data on their phone or computer, and states that notes are in 📝Markdown format; the site adds that notes are saved to an open format so users always keep access to them. Users can choose between Rich Text and Markdown editors and customise the app with plugins and themes, or write their own scripts and plugins with its Extension API.
Joplin can synchronise notes with cloud services including Nextcloud, Dropbox, OneDrive and its own Joplin Cloud, and uses 📝end-to-end encryption to secure them. Notes exported from 📝Evernote can be imported, with their formatted content converted to Markdown, and a web clipper extension for Chrome and Firefox saves web pages or screenshots as notes. As of November 2026, the pricing page lists Joplin Cloud plans named Basic, Pro, Pro 100 GB and Teams, plus a Joplin Server Business option priced per user. The repository's licence file places its code under AGPL-3.0-or-later by default, while any directory with its own licence file, such as the server package, follows that file instead.