Secure Password Tool

Generate cryptographically secure random passwords. Customizable length, character types, exclude similar characters. Pure Python standard library, no API key required.

Secure Password Generator

Generate cryptographically secure random passwords using Python's secrets module. No API keys, no external services, completely offline.

Features

• Cryptographically secure: Uses secrets module (not random)
• Customizable length: Default 16 characters
• Character types: Uppercase, lowercase, digits, special symbols
• Exclude similar characters: Remove 0, O, 1, l, I to avoid confusion
• Batch generation: Generate multiple passwords at once
• Pure standard library: Zero dependencies, works offline

Usage

# Generate a 16-character password (default)
python3 scripts/password_generator.py

# Generate a 20-character password
python3 scripts/password_generator.py 20

# Generate 10 passwords of 24 characters
python3 scripts/password_generator.py 24 10

# Exclude similar characters (0O1lI)
python3 scripts/password_generator.py 16 --exclude-similar

# Password without special symbols
python3 scripts/password_generator.py 16 --no-special

Examples

Generate a strong 20-character password
Generate 5 passwords of 16 characters each
Generate a password without special symbols for a website that doesn't allow them

Options

Option	Description
LENGTH	Password length (default: 16)
COUNT	Number of passwords to generate (default: 1)
--no-upper	Exclude uppercase letters
--no-lower	Exclude lowercase letters
--no-digits	Exclude digits
--no-special	Exclude special symbols
--exclude-similar	Exclude 0, O, 1, l, I

Security Notes

• Uses secrets.choice() for cryptographically secure randomness
• Suitable for generating passwords, API keys, tokens
• Not suitable for password hashing (use bcrypt/argon2 for storage)

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中文说明

安全的随机密码生成器，使用Python标准库secrets模块，无需API Key。

• 默认16位强密码
• 支持自定义长度、字符类型
• 可排除相似字符（0O1lI）
• 支持批量生成