Password Generator

Secure password generator with multiple character sets and strength analysis. Use when: (1) generating strong passwords, (2) creating memorable passphrases, (3) analyzing password strength, or (4) any password-related security needs. Supports random passwords, passphrases, and detailed strength analysis.

Generate secure passwords and passphrases locally. No network calls - everything is generated on your machine using cryptographically secure random functions.

When to Use

• Generate strong passwords for accounts
• Create memorable passphrases
• Analyze existing password strength
• Build secure password policies

Quick Start

Generate Strong Password

bash

python3 scripts/password-gen.py generate
# Output: 🔐 Password Generated
#         Password: K:kx]h--Xo<RKwKp
#         Length: 16
#         Strength: Strong

Generate Passphrase

bash

python3 scripts/password-gen.py passphrase 6
# Output: Password: lambda-window-yellow-nu-mu

Analyze Password

bash

python3 scripts/password-gen.py analyze "MyPassword123!"

Commands

generate [length] [options]

Generate a random password with specified options.

Options:

• --no-upper - Exclude uppercase letters
• --no-lower - Exclude lowercase letters
• --no-digits - Exclude digits
• --no-symbols - Exclude symbols
• --exclude-ambiguous - Exclude ambiguous characters (0,O,l,I)
• --exclude-similar - Exclude similar characters

Examples:

bash

# Default 16-character password
python3 scripts/password-gen.py generate

# 20-character password
python3 scripts/password-gen.py generate 20

# Letters only (no symbols)
python3 scripts/password-gen.py generate 12 --no-symbols

# Numbers and letters only
python3 scripts/password-gen.py generate 16 --no-symbols

# Exclude ambiguous characters
python3 scripts/password-gen.py generate 16 --exclude-ambiguous

# Custom combination
python3 scripts/password-gen.py generate 12 --no-upper --no-symbols

passphrase [word_count] [options]

Generate a memorable passphrase (series of words).

Options:

• --separator=char - Word separator (default: "-")

Examples:

bash

# Default 4-word passphrase
python3 scripts/password-gen.py passphrase

# 6-word passphrase
python3 scripts/password-gen.py passphrase 6

# Custom separator
python3 scripts/password-gen.py passphrase 5 --separator="_"

analyze <password>

Analyze the strength and composition of a password.

Examples:

bash

python3 scripts/password-gen.py analyze "MyPassword123!"

python3 scripts/password-gen.py analyze "weakpass"

list

List available character sets and excluded characters.

bash

python3 scripts/password-gen.py list

Password Strength Levels

• Weak - Short or missing character types
• Medium - Decent length with multiple character types
• Strong - Long with all character types
• Very Strong - Very long with diverse character set

Security Features

• Uses secrets module for cryptographically secure randomness
• No network requests - all generation is local
• Configurable character sets
• Excludes ambiguous characters option
• Strength analysis and recommendations

Character Sets

• Lowercase letters: a-z (or a-z without l,o if excluding ambiguous)
• Uppercase letters: A-Z (or A-Z without I,O if excluding ambiguous)
• Digits: 0-9 (or 2-9 if excluding ambiguous)
• Symbols: !@#$%^&*()_+-=[]{}|;:,.<>?~`

Examples

Basic Usage

bash

# Generate strong password
python3 scripts/password-gen.py generate

# Generate 24-character password
python3 scripts/password-gen.py generate 24

For Different Use Cases

bash

# Database password (no ambiguous chars)
python3 scripts/password-gen.py generate 20 --exclude-ambiguous

# PIN code (numbers only)
python3 scripts/password-gen.py generate 6 --no-upper --no-lower --no-symbols

# Website password (letters and numbers)
python3 scripts/password-gen.py generate 16 --no-symbols

# Memorable password (passphrase)
python3 scripts/password-gen.py passphrase 5

Analysis Examples

bash

# Analyze existing password
python3 scripts/password-gen.py analyze "MyPassword123!"

# Check if password is weak
python3 scripts/password-gen.py analyze "password123"

Tips

• Use at least 12-16 characters for good security
• Include all character types when possible
• Consider passphrases for better memorability
• Avoid using personal information
• Use different passwords for different accounts
• Consider using a password manager

Troubleshooting

"Password too weak" warnings:

• Increase length
• Add more character types
• Use the --exclude-ambiguous option for clarity

"Command not found":

• Ensure Python 3 is installed
• Check script permissions: chmod +x scripts/password-gen.py

Security Notes

• Generated passwords are shown in plain text
• Copy passwords immediately after generation
• Don't save passwords in command history
• Use secure methods to store generated passwords
• Consider using a password manager for storage