Password Security Best Practices
Do:
- Use at least 12-16 characters
- Mix uppercase, lowercase, numbers, symbols
- Use unique passwords for each account
- Use a password manager (Bitwarden, 1Password)
- Enable two-factor authentication (2FA)
Don't:
- Use dictionary words, names, or birthdays
- Reuse passwords across accounts
- Share passwords via email or chat
- Write passwords on sticky notes
- Use common patterns (123456, qwerty)
Privacy: All passwords are generated locally in your browser using
crypto.getRandomValues(). Nothing is sent to any server.About This Password Generator
Generate cryptographically secure random passwords with customizable options. Uses the Web Crypto API (crypto.getRandomValues()) for true randomness — the same standard used by password managers and security tools.
Cryptographically secure random generation
Customizable length (6-128 characters)
Real-time entropy and strength analysis
Brute-force time estimation
Generate up to 50 passwords at once
100% client-side — no data leaves your browser
Frequently Asked Questions
How does this password generator work?
This tool uses crypto.getRandomValues(), a cryptographically secure random number generator built into modern browsers (Web Crypto API). All passwords are generated entirely in your browser — no data is sent to any server.
How long should a strong password be?
Security experts recommend at least 12-16 characters for strong passwords. Longer passwords with mixed character types (uppercase, lowercase, numbers, symbols) are exponentially harder to crack. A 16-character password with all character types has over 100 bits of entropy — taking millions of years to brute-force.
Is it safe to generate passwords online?
Yes, if the generator runs entirely in your browser (client-side) using cryptographically secure methods. This tool generates all passwords locally using the Web Crypto API. Nothing is transmitted over the network. You can verify this by checking the network tab in your browser's developer tools.
What is password entropy?
Password entropy measures the randomness (unpredictability) of a password in bits. It is calculated as log2(pool_size ^ length). Higher entropy = stronger password. Below 40 bits is weak, 60-80 bits is good, and 80+ bits is strong. This tool shows the entropy and estimated brute-force crack time for every generated password.