Password Generator

Generate cryptographically secure random passwords.

Password Length 16

4 128

Character Types

Uppercase A-Z

Lowercase a-z

Numbers 0-9

Special %*)?@#$~

Additional Options

Avoid repeating characters

Exclude ambiguous characters (0, O, l, 1, I)

About This Generator

This password generator uses the Web Crypto API (crypto.getRandomValues()) to generate cryptographically secure random numbers. This is the same source of randomness used by web browsers for TLS/SSL encryption.

Security Tips

Length matters most: A longer password is exponentially harder to crack than a shorter one with more character types.
Use unique passwords: Never reuse passwords across different accounts.
Consider a password manager: Tools like Bitwarden, 1Password, or KeePass can generate and securely store unique passwords.
Enable 2FA: Two-factor authentication adds another layer of security beyond passwords.

Password Strength

Password strength is calculated based on:

Length (longer is stronger)
Character variety (mixing types increases entropy)
Total possible combinations (entropy bits)

Entropy Calculation

Charset	Size	Entropy/char
Numbers only	10	3.32 bits
Lowercase only	26	4.70 bits
Mixed case	52	5.70 bits
Mixed + numbers	62	5.95 bits
All + special	70	6.13 bits

A 16-character password with mixed case + numbers has ~95 bits of entropy, which would take billions of years to brute force.