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🔐 Password Strength Analyzer

A Flask-based web application that analyzes password strength based on security best practices. The application evaluates passwords using multiple criteria, provides improvement suggestions, generates secure passwords, and prevents password reuse using bcrypt hashing with SQLite.

📸 Project Screenshots

🏠 Home Page

Homepage

🔴 Weak Password Analysis

Weak Password

🟡 Medium Password Analysis

Medium Password

🟢 Strong Password Analysis

Strong Password

🟢 Very Strong Password Analysis

Strong Password

🔑 Generated Strong Password

Generated Password

⚠ Password Reuse Detection

Password Reuse

🚀 Features

  • ✅ Password Length Validation
  • ✅ Uppercase Letter Detection
  • ✅ Lowercase Letter Detection
  • ✅ Number Detection
  • ✅ Special Character Detection
  • ✅ Password Strength Score
  • ✅ Strength Classification
  • ✅ Password Improvement Suggestions
  • ✅ Strong Password Generator
  • ✅ Password Reuse Detection
  • ✅ Secure Password Storage using bcrypt
  • ✅ SQLite Database Integration
  • ✅ Show / Hide Password
  • ✅ Copy Generated Password

🛠 Technologies Used

  • Python
  • Flask
  • SQLite
  • bcrypt
  • HTML5
  • CSS3
  • JavaScript

📂 Project Structure

PasswordStrengthAnalyzer/
│
├── app.py
├── analyzer.py
├── generator.py
├── database.py
├── common_passwords.txt
├── requirements.txt
├── README.md
│
├── assets/
│   ├── style.css
│   ├── script.js
│   └── images/
│
├── templates/
│   └── index.html
│
├── database/
│   └── passwords.db
│
└── screenshots/
    └── homepage.png

⚙ Installation

Clone the repository

git clone https://github.com/nalawadeshravani202/Password-Strength-Analyzer.git

Go into the project folder

cd Password-Strength-Analyzer

Create a virtual environment

python -m venv venv

Activate the virtual environment

Windows

venv\Scripts\activate

Install dependencies

pip install -r requirements.txt

Run the project

python app.py

Open in browser

http://127.0.0.1:5000

🔒 Password Evaluation Criteria

Criteria Score
Length ≥ 8 20
Uppercase Letter 15
Lowercase Letter 15
Number 15
Special Character 20
Not Common Password 10
No Repeated Characters 5

📊 Password Strength Levels

Score Strength
0–39 Weak
40–69 Medium
70–89 Strong
90–100 Very Strong

💡 Future Enhancements

  • Password Entropy Calculation
  • Password Breach Check API
  • Dark Mode
  • Live Password Analysis
  • Password History Dashboard
  • Export Report as PDF
  • Multi-language Support

👩‍💻 Author

Shravani Nalawade

⭐ If you found this project useful, consider giving it a star.