🔐 Password Strength Checker & Generator

A small Tkinter desktop app to check password strength and generate strong random passwords, with one-click clipboard copy.

Features

• Live strength check: Weak / Medium / Strong, scored on:
  • Length
  • Uppercase & lowercase letters
  • Numbers
  • Special characters
• Visual score bar (color-coded) + character checklist
• Secure random password generator (secrets module — not random)
• Customizable generator: length, and which character types to include
• Copy to clipboard button (checker section + generator section)

Project Structure

password_toolkit/
├── main.py                # Entry point — run this
├── gui.py                 # Tkinter UI (widgets, layout, events only)
├── strength_checker.py    # Strength-analysis logic (no UI)
├── password_generator.py  # Secure password generation logic (no UI)
├── constants.py            # Shared constants (char sets, colors, thresholds)
├── test_logic.py           # Unit tests for the logic modules
└── README.md

The logic (strength_checker.py, password_generator.py) is fully separated from the UI (gui.py), so it can be reused in a CLI, a web backend, or tested independently — which is what test_logic.py does.

Strength Rules

Condition	Result
Length < 8	Weak
Letters only	Weak
Letters + numbers	Medium
Letters + numbers + symbols, length ≤ 12	Medium
Letters + numbers + symbols, length > 12	Strong

Run

cd password_toolkit
python main.py

Requires only the Python standard library (tkinter, secrets, string) — no pip install needed.

Run Tests

python -m unittest test_logic.py