- name
- password-gen
- description
- 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
# 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 |
