Mini Diarium is a local-only journaling application that focuses on privacy, ownership, and a deliberately small feature set.
It stores journal data on your machine, encrypts entries at rest, and avoids cloud sync, telemetry, analytics, and background network activity. Built with Tauri, SolidJS, Rust, and SQLite, the program has cross-platform support.
This is free and open source software.
Key Features
- Supports key file authentication alongside passwords, letting you unlock the journal with an X25519 private key file.
- Encrypts journal entries with AES-256-GCM using a wrapped master key design.
- Offers a rich text editor with calendar-based navigation and support for multiple entries on the same date.
- Imports data from Mini Diary, Day One, and jrnl formats.
- Exports journals to JSON and Markdown formats.
- Includes automatic backups with rotation, along with statistics, themes, and configurable preferences.
- Cross-platform support – runs under Linux, macOS, and Windows.
Website: github.com/fjrevoredo/mini-diarium
Support:
Developer: Francisco J. Revoredo
License: MIT License

Mini Diarium is written in TypeScript. Learn TypeScript with our recommended free books and free tutorials.
Related Software
| Diary Apps | |
|---|---|
| RedNotebook | Daily journal with calendar, templates and keyword searching |
| Lifeograph | Off-line and private journal and note taking application |
| Kontact | Unites mature and proven applications |
| jrnl | Simple journal application for your command line |
| Caps-Log | Terminal-based journaling tool |
| Almanah Diary | Small diary application |
| Org mode | Powerful system for organizing projects, tasks and notes in Emacs |
| ThotKeeper | Cross-platform and hierarchical personal journal manager |
| Simple Diary | Simple and lightweight diary app |
Read our verdict in the software roundup.
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