GitHub - fjrevoredo/mini-diarium: An encrypted local cross-platform journaling app
Hacker News
February 19, 2026
AI-Generated Deep Dive Summary
Mini Diarium is an encrypted, cross-platform journaling app designed for privacy-conscious users who value local storage and strong security. Built with modern technologies like Tauri, SolidJS, and Rust, the app offers AES-256-GCM encryption, ensuring that every journal entry is securely stored on your device without ever leaving it or connecting to the internet. Unlike traditional journaling apps, Mini Diarium allows for both password-based and key file authentication, providing an additional layer of security akin to SSH keys for your diary entries. This approach ensures that even if you lose your password, your data remains protected unless you have the corresponding key file.
The app’s architecture is designed with privacy in mind. Each entry is encrypted using a random master key, which is then wrapped and securely managed by authentication methods—whether it’s a password or an X25519 private key file. This design ensures that adding or removing authentication methods doesn’t require re-encrypting entries, making the process efficient and user-friendly. Mini Diarium also supports rich text formatting, calendar navigation, and seamless import/export capabilities for popular formats like JSON and Markdown. The app’s UI, powered by SolidJS, communicates with a Rust backend via Tauri, ensuring a lightweight and responsive experience.
One of Mini Diarium’s standout features is its minimalistic design, inspired by Samuel Meuli’s Mini Diary but rebuilt with modern tools to improve performance and security. The app offers automatic backups upon unlocking, future entry management, and preferences for customization, such as spellcheck and password policies. Its cross-platform compatibility ensures it works seamlessly on Windows, macOS, and Linux, with no telemetry or network access, making it an ideal choice for users who prioritize privacy and local data control. For tech enthusiasts and developers, Mini Diarium’s open-source nature and reproducible builds add to its appeal, offering transparency and trust in its operations.
For readers interested in tech and security, Mini Diarium stands out as a testament to the importance of local-first applications in an increasingly connected world. Its focus on encryption, offline functionality, and user-centric authentication methods addresses the growing need for secure, private digital tools. By leveraging modern frameworks like Tauri and Rust, the
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Originally published on Hacker News on 2/19/2026