**Joplin** is a free, open source note taking and to-do application, which can handle a large number of notes organised into notebooks. The notes are searchable, can be copied, tagged and modified either from the applications directly or from your own text editor. The notes are in Markdown format.

Images, videos, PDFs and audio files are supported. Create math expressions and diagrams directly from the app. Use the web clipper extension, available on Chrome and Firefox, to save web pages or take screenshots as notes. Customise the app with plugins, custom themes and multiple text editors (Rich Text or Markdown).

Joplin is "offline first", which means you always have all your data on your phone or computer. Access your notes from your computer, phone or tablet by synchronising with various services, including Joplin Cloud, Dropbox and OneDrive. The app is available on Windows, macOS, Linux, Android and iOS. A terminal app is also available!

The app is open source and your notes are saved to an open format, so you'll always have access to them. Uses End-To-End Encryption (E2EE) to secure your notes and ensure no-one but yourself can access them.