Password Gen

Generate secure passwords, passphrases, and PINs with entropy analysis. Use when the user needs a random password, passphrase, PIN, or wants to check how strong an existing password is. Supports custom length, character sets, exclusions, batch generation, and JSON output. Zero external dependencies.

Password Generator

Generate cryptographically secure passwords, passphrases, and PINs from the command line. Analyze existing passwords for strength. Uses Python secrets module for CSPRNG — no external dependencies.

Quick Start

bash

# Generate a 16-character password
python3 scripts/password_gen.py

# Generate a 32-character password, 5 at a time
python3 scripts/password_gen.py -l 32 -n 5

# Passphrase (4 random words)
python3 scripts/password_gen.py --passphrase

# 6-word passphrase, capitalized, with number
python3 scripts/password_gen.py --passphrase -w 6 --capitalize --add-number

# PIN
python3 scripts/password_gen.py --pin
python3 scripts/password_gen.py --pin -l 8

# Analyze a password
python3 scripts/password_gen.py --analyze 'MyP@ssw0rd!'

# JSON output
python3 scripts/password_gen.py --json

Commands

Flag	Description
-l, --length N	Password length (default: 16)
-n, --count N	Generate N passwords
--no-uppercase	Exclude uppercase letters
--no-lowercase	Exclude lowercase letters
--no-digits	Exclude digits
--no-symbols	Exclude symbols
--exclude CHARS	Exclude ambiguous chars like lI1O0
--must-include CHARS	Force specific characters to appear
--passphrase	Word-based passphrase mode
-w, --words N	Words in passphrase (default: 4)
--separator SEP	Passphrase separator (default: -)
--capitalize	Capitalize passphrase words
--add-number	Append random number to passphrase
--pin	Numeric PIN mode
--analyze PW	Analyze existing password strength
--json	JSON output

Entropy Guide

Bits	Strength	Use Case
< 28	Very Weak	Never use
28-35	Weak	Throwaway accounts only
36-59	Moderate	General accounts
60-79	Strong	Important accounts
80-127	Very Strong	Financial, admin
128+	Excellent	Master passwords, encryption keys