🔐 Password Generator
Generate secure, random passwords with customizable options and real-time strength analysis
Understanding Password Security
Why Random Passwords Matter
Random passwords are crucial for security because they're immune to dictionary attacks and common password patterns. Our generator uses cryptographically secure randomness (crypto.getRandomValues()) to ensure unpredictability.
Understanding Entropy
Entropy measures password randomness in bits. Each bit doubles the number of possible passwords. For example, 60 bits means 2⁶⁰ possible combinations. Higher entropy = stronger password. Aim for 60+ bits for important accounts.
Password Best Practices
Use unique passwords for each account, enable two-factor authentication when available, and consider using a password manager to store your passwords securely. Never reuse passwords across different services.
How to Use This Tool
- Adjust the password length using the slider (8-64 characters) - longer is better for security
- Select which character types to include (uppercase, lowercase, numbers, symbols)
- Optionally exclude ambiguous characters that look similar if you'll be typing the password manually
- Click "Generate Password" to create a cryptographically secure random password
- Review the strength meter and entropy to ensure adequate security (aim for 60+ bits)
- Click "Copy" to copy the password to your clipboard and use it for your account
Frequently Asked Questions
What makes a strong password?
A strong password is long (12+ characters), uses multiple character types (uppercase, lowercase, numbers, symbols), and is completely random. Our tool shows entropy in bits - aim for 60+ bits for good security.
Is this password generator secure?
Yes! Passwords are generated using JavaScript's crypto.getRandomValues() for cryptographically secure randomness. Everything happens in your browser - we never see or store your passwords.
What are ambiguous characters?
Ambiguous characters look similar and can be confused: 0/O (zero/letter O), 1/l/I (one/lowercase L/uppercase i). Excluding them makes passwords easier to type manually.
Is this tool free to use?
Yes, this password generator is completely free to use with no registration or account required.
Does this work on mobile devices?
Yes, this tool is fully responsive and works on all mobile devices, tablets, and desktop computers.