DailyTxT

DailyTxT is a self-hosted encrypted diary and journal web application that encrypts user data before writing it to server storage. It provides a responsive web UI with a markdown editor, file attachments, tagging and search while keeping each account's data encrypted with per-user keys.

Key Features

• Client-side encryption workflow using ChaCha20-Poly1305 for stored data and Argon2id for deriving keys
• Per-user encryption keys and backup-key mechanism for password recovery; admin cannot read user plaintext
• Markdown editor with live preview and custom entry templates
• Encrypted file uploads (images automatically detected) with a 500 MB per-file limit
• Full-text server-side search across entries, tags and filenames
• Tagging, calendar navigation, read/distraction-free mode and per-user statistics (GitHub-like activity graph)
• Export entries (including uploaded files) to HTML and data stored as JSON files (no external database required)
• Multi-user support with an admin panel for user management and temporary open registration
• Responsive design and PWA support for mobile/home-screen installation

Use Cases

• Personal encrypted journaling where entries and attachments are stored encrypted on a self-hosted server
• Small teams, families or groups needing separate user accounts with per-account encryption and admin-managed access
• Portable, long-term archival of journal data stored as readable JSON files and exportable to HTML

Limitations and Considerations

• Search requires server-side access to decrypted data for indexing; the project does not provide full end-to-end searchable encryption
• Data is stored as JSON files rather than a database; this favors portability but may affect scaling and performance for very large installations
• Authentication stores a derived key in an http-only cookie for API calls; administrators should follow best practices for TLS and host hardening

DailyTxT is focused on privacy-minded journaling with practical features like search, attachments and export while keeping user data encrypted at rest. It is suitable for users who want a portable, self-hosted diary with per-account encryption and straightforward deployment via Docker.