Notesnook

Notesnook is a note-taking application designed with an emphasis on security and privacy. It uses robust encryption algorithms to protect all stored information, ensuring that only the user has access to their content.

★★★★★

4.5(2 ratings)

• Military-grade encryption. Implements XChaCha20-Poly1305-IETF and Argon2 algorithms for data protection. Encryption happens directly on the device before any synchronization. Decryption keys are never shared with the servers.
• Cross-platform sync. Access your notes from any device with the client installed. Synchronization uses end-to-end encryption. Works in the background without requiring constant interaction.
• Text editor with focus mode. Includes basic formatting and paragraph tools. Focus mode hides interface elements to reduce distractions. Built-in support for dark theme and font size adjustment.
• Hierarchical organization. A notebook system for grouping related notes. Each notebook supports a custom title, description, and list of topics. Create shortcuts and mark notes as favorites.
• Search and tagging. A search engine that indexes encrypted content. Advanced filtering with customizable tags. Results show contextual snippets of the matched text.
• Publish and share. Generate public URLs that give access to specific notes. Optionally protect published notes with an additional password. Recipients do not need an account or app to view shared content.
• Secure local storage. All notes are stored encrypted on the device. Full functionality is available without an internet connection. Changes are synchronized as soon as an active connection is detected.
• Access protection. Lock the app with a password or biometric authentication. Configurable timer for automatic locking. An additional layer of security for especially sensitive notes.
• Version history. Saves a copy of every change made to your notes. Restore previous states at any time. The history also remains encrypted and protected.
• Secure export. Create backup copies in standard formats. Encryption is preserved during the export process. Option to include metadata and attachments in exports.

Notesnook was developed by Streetwriters GmbH as a secure alternative to conventional note-taking apps. The first stable version was released in 2021. The encryption core uses cryptographic libraries such as libsodium, implemented in JavaScript/TypeScript. The interface was built with React, and synchronization relies on custom protocols over a client-server architecture.

Alternatives to Notesnook:

For Notesnook there are 2 alternative programs. Free: 2, paid: 0.

Inkodo

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