A single-file, encrypted todo manager with password protection. No servers, no databases, no tracking - just a secure HTML file that works anywhere.
- 🔐 Password Protected: All data is encrypted with your chosen password
- 📱 Single HTML File: No installation required - just open in any browser
- 💾 Auto-Save: Changes are automatically saved within the file
- 🌐 Works Offline: No internet connection needed after initial download
- 🎨 Dark Theme: Easy on the eyes with Claude-inspired orange accents
- 📋 Multiple Sections: Organize Todos, Tasks, Goals, and Notes
- 🏷️ Priority Levels: Mark items as High, Medium, or Low priority
- 📦 Portable: Download and use on any device
Visit: https://farzadhallaji.github.io/secure-todo-manager/
- Download the
index.htmlfile - Open it in any modern web browser
- Create a password on first use
- Start organizing your life!
- Open the file in your browser
- Enter any password you want (remember it!)
- This password encrypts all your data
- Click on any section (Todos, Tasks, Goals, Notes)
- Fill in the title and description
- Select priority (for Todos, Tasks, Goals)
- Click "Add" - it auto-saves!
- Auto-save: Every change is automatically encrypted and saved
- Download Updated File: Click "💾 Save HTML File" to download the latest version with all your data
- Your password is never stored anywhere
- All data is encrypted using XOR cipher with Base64 encoding
- Even if someone gets your HTML file, they can't read your data without the password
- If you forget your password, your data cannot be recovered (by design)
For daily tasks and things you need to get done
For project-related work items and assignments
For long-term objectives and aspirations
For thoughts, ideas, and general information
- Pure HTML/CSS/JavaScript: No frameworks or dependencies
- Client-side Encryption: All encryption happens in your browser
- Zero External Requests: Complete privacy - no analytics, no tracking
- Responsive Design: Works on desktop, tablet, and mobile
- Make your changes in the app
- Click "💾 Save HTML File"
- Replace the old file with the new download
- Download the updated file
- Go to your GitHub repository
- Upload the new file (replacing
index.html) - Changes will be live in a few minutes
- Remember Your Password: There's no password recovery - if you forget it, your data is lost
- Keep Backups: Regularly download and backup your HTML file
- One Password Per File: Each HTML file has its own password
- Browser Compatibility: Works best in modern browsers (Chrome, Firefox, Safari, Edge)
Q: What happens if I forget my password?
A: Your data cannot be recovered. The encryption is designed to be secure.
Q: Can I use different passwords for different files?
A: Yes! Each HTML file can have its own unique password.
Q: Is my data really secure?
A: The encryption provides good protection for personal use. For highly sensitive data, consider additional security measures.
Q: Can I share my todo list with others?
A: Yes, share the HTML file and password. Anyone with both can access the data.
Q: Does it work offline?
A: Yes! Once you have the HTML file, no internet is needed.
This project is free to use, modify, and distribute. Created with ❤️ for personal productivity.
- Basic encryption (XOR cipher) - suitable for personal use but not military-grade
- Password cannot be changed after initial setup (would require re-encryption)
- No cloud sync - manual file management required
- Use a password manager to store your password
- Set up regular backups of your HTML file
- Create separate files for different purposes (work.html, personal.html)
- The file can be stored in cloud services like Dropbox or Google Drive
Made with 🧡 using HTML, CSS, and JavaScript. No cookies, no tracking, just productivity.