Joplin is a free, open-source note-taking and task management application designed for users who prioritize privacy and cross-platform accessibility. Built with Electron for desktop and React Native for mobile, it offers a Markdown-based editing experience with full-text search, tagging, and notebook organization. Unlike cloud-dependent alternatives, Joplin is ‘offline first’—all notes are stored locally on your device and synchronized securely via end-to-end encryption to services like Nextcloud, Dropbox, OneDrive, or Joplin Cloud. This ensures your data remains under your control without vendor lock-in. It supports importing Evernote exports (ENEX files) with full metadata preservation and plain Markdown files, making it an ideal migration tool for users transitioning from proprietary note apps. The Web Clipper extension allows seamless saving of web content directly into your Joplin notebooks from Chrome or Firefox.
What You Get
- End-to-end encrypted sync - Notes and attachments are encrypted locally before syncing to cloud services like Nextcloud, Dropbox, or OneDrive; only you hold the encryption keys.
- Evernote (ENEX) import - Full migration from Evernote including formatted content, images, attachments, creation/modified timestamps, and geolocation data converted to Markdown.
- Web Clipper extension - Save web pages, articles, and screenshots directly from Chrome or Firefox into your Joplin notebooks with one click.
- Markdown-based notes - All notes are stored as plain Markdown files, ensuring future-proofing and compatibility with any text editor or tool.
- Cross-platform support - Native apps for Windows, macOS, Linux, Android, and iOS with synchronized data across all devices.
- Plugin and theme system - Extend functionality or customize appearance using community plugins and themes; create your own with JavaScript/TypeScript.
- Full-text search - Instantly find notes by content, tags, or notebook across all devices with no latency or dependency on cloud indexing.
Common Use Cases
- Building a private knowledge base for researchers - Academics and writers use Joplin to collect, tag, and reference research notes with encrypted sync across laptop and tablet, avoiding cloud providers that monetize user data.
- Migrating from Evernote to a privacy-respecting alternative - Users export their entire Evernote library as ENEX and import it into Joplin, preserving formatting, images, and metadata while gaining full control over storage.
- Developers managing code snippets and documentation - Engineers store bash commands, API references, and project notes in Markdown files synced via Nextcloud, accessible offline during travel or network outages.
- Team workflows with encrypted shared notebooks - Small teams use Joplin with a self-hosted Nextcloud server to share encrypted notes without exposing content to third-party cloud providers.
Under The Hood
Joplin is a feature-rich, open-source note-taking application designed to support multiple platforms including desktop, mobile, and CLI environments. It emphasizes local-first storage, cloud synchronization, and extensibility through a plugin architecture. The project is built using modern web and mobile development practices, combining TypeScript with React and Electron for cross-platform compatibility.
Architecture
Joplin adopts a layered monorepo structure that enables modular development and clear separation of concerns across its various client and server components.
- The architecture uses a layered approach with distinct packages for CLI, desktop, mobile, and shared utilities to support multi-platform development
- Component interactions are managed through well-defined APIs and event systems, with plugin architectures and middleware patterns for extensibility
- Design patterns such as strategy pattern for command handling, factory pattern for plugin creation, and observer pattern for event management are consistently applied
Tech Stack
The project leverages a diverse tech stack to support its multi-platform capabilities and robust functionality.
- Built primarily in TypeScript and JavaScript, with React for UI components and Electron for cross-platform desktop support
- Relies on Node.js ecosystem tools such as React Native, Redux, and fs-extra for file operations and state management
- Uses monorepo tools like Lerna and Yarn workspaces, alongside Gulp, Webpack, and Grunt for build orchestration and automation
- Integrates Jest for testing, ESLint for linting, and CI/CD pipelines to ensure code quality and continuous integration
Code Quality
Joplin demonstrates a mature development approach with strong emphasis on testing and consistent code practices.
- Comprehensive test coverage is maintained across CLI components, with integration and unit tests ensuring reliability
- Error handling is consistently implemented using try/catch blocks and meaningful error messages throughout the codebase
- Code consistency is upheld through established naming conventions and structured module organization
What Makes It Unique
Joplin distinguishes itself through its extensibility, rich text editing, and secure local-first design.
- Its plugin-first architecture treats plugins as first-class citizens, enabling deep customization without core modifications
- Embeds a full-featured rich text editor with custom list handling and extensibility, offering advanced formatting not commonly found in open-source tools
- Combines local data storage with secure cloud sync and end-to-end encryption, providing both offline access and enterprise-grade security
- Offers a comprehensive API and CLI integration that enables automation and system-level interactions rare in typical note-taking tools