PassMeter - Modern Password Strength Analyzer

A professional password strength analyzer built with Flask and modern JavaScript. Features advanced entropy calculation, pattern detection, and a clean glassmorphism UI design.

Features

• Real-time Analysis: Instant password strength feedback as you type
• Entropy Calculation: Advanced cryptographic strength measurement
• Pattern Detection: Identifies common weak patterns like keyboard sequences and repetitions
• Security Recommendations: Actionable tips to improve password strength
• Modern UI: Clean, responsive design with smooth animations
• Accessibility: Built with semantic HTML and ARIA attributes

Demo

Live Demo

Example Passwords

Try these examples to see how the analyzer works:

• Very Weak: password123 - Common word "password" + predictable numbers
• Weak: MyPassword2024! - Contains "My", "Password", and year "2024"
• Fair: abc123def - Mixed case and numbers, but predictable patterns
• Good: Tr0ub4dor&3 - Mixed case, numbers, symbols, no common words
• Strong: jazz-piano-mountain-89! - Passphrase with good entropy
• Very Strong: K9#mP$vL2@nX7&qR5! - Random characters with maximum entropy

Getting Started

Prerequisites

• Python 3.7+
• pip

Installation

git clone https://github.com/twmiles/passmeter.git
cd passmeter
pip install -r requirements.txt
python app.py

The application will be available at http://localhost:5000

Project Structure

passmeter/
├── app.py                 # Flask backend
├── index.html            # Main frontend
├── styles.css            # Styling and animations
├── password-strength.js  # Frontend logic
├── requirements.txt      # Python dependencies
└── README.md            # This file

How It Works

The analyzer evaluates passwords using multiple criteria:

1. Character Set Analysis: Checks for mixed case, numbers, and symbols
2. Entropy Calculation: Measures true cryptographic strength
3. Pattern Detection: Identifies common weak patterns
4. Dictionary Checks: Warns about common passwords
5. Length Assessment: Considers minimum length requirements

API Endpoints

• GET / - Main application
• GET /api/health - Health check
• POST /api/analyze - Password analysis
• GET /api/docs - API documentation

Contributing

1. Fork the repository
2. Create a feature branch (git checkout -b feature/amazing-feature)
3. Commit your changes (git commit -m 'Add amazing feature')
4. Push to the branch (git push origin feature/amazing-feature)
5. Open a Pull Request

License

This project is licensed under the MIT License - see the LICENSE file for details.

About

PassMeter was created to provide a modern, accessible tool for password security assessment. Built with best practices in mind, it combines security analysis with a beautiful user experience.

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PassMeter - Making password security beautiful and accessible Built with ❤️ for better password security