PassGen 🔐

A fast, secure password generator CLI built in Rust.

Features

• 🔒 Cryptographically secure random generation
• 📊 Password strength/entropy analysis
• 🎨 Color-coded output (uppercase, lowercase, digits, symbols)
• ⚙️ Highly customizable character sets
• 📋 Generate multiple passwords at once
• ⚡ Blazing fast

Installation

# Clone the repo
git clone https://github.com/littleKitchen/PassGen.git
cd PassGen

# Build
cargo build --release

# Run
./target/release/PassGen

Usage

# Generate a 16-character password (default)
passgen

# Generate a 24-character password
passgen -l 24

# Generate 5 passwords
passgen -c 5

# No symbols (alphanumeric only)
passgen --no-symbols

# No uppercase
passgen --no-upper

# Digits only (like a PIN)
passgen --no-lower --no-upper --no-symbols -l 6

# Exclude ambiguous characters
passgen -e "0O1lI"

# Custom characters only
passgen --no-lower --no-upper --no-digits --no-symbols --custom "abc123!@#"

Options

Flag	Description	Default
-l, --length	Password length	16
-c, --count	Number of passwords	1
--no-lower	Exclude lowercase letters	false
--no-upper	Exclude uppercase letters	false
--no-digits	Exclude digits	false
--no-symbols	Exclude symbols	false
--custom	Add custom characters	-
-e, --exclude	Exclude specific characters	-
-C, --copy	Copy to clipboard	false

Example Output

🔐 Password Generator
────────────────────────────────────────
Length: 20 | Charset: 88 chars | Entropy: 129.2 bits
Strength: Very Strong
────────────────────────────────────────

  [1]  5m2Qyn@J%1$?dv}r^@z^
  [2]  8&MBO;.8Q9cQ,%b|fy.l
  [3]  _qAkd5]2$4#17n*5@qrr

Password Strength

Entropy	Strength
< 28 bits	Very Weak
28-35 bits	Weak
36-59 bits	Reasonable
60-127 bits	Strong
≥ 128 bits	Very Strong

License

MIT

Author

Yuxuan Che