Password Generator

A password generator is a tool that creates random, unpredictable passwords using cryptographic randomness. Unlike passwords that humans create — which tend to follow predictable patterns, use dictionary words, or reuse the same base password — generated passwords have maximum entropy for their length, making them vastly harder to crack.

This generator uses the Web Crypto API built into every modern browser, producing passwords that are cryptographically secure. The randomness comes from your operating system's entropy pool, not from a pseudo-random algorithm.

Data breaches expose billions of passwords every year. Attackers use these leaked databases to try common passwords, dictionary words, and known patterns against other accounts. If you're using a password you created yourself — even one you think is clever — there's a good chance a variation of it already exists in a breach database.

Generated passwords solve this problem completely. A random 20-character password with mixed character types would take billions of years to brute-force with current technology. Combined with a password manager, generated passwords let you use a unique, uncrackable password for every account without needing to remember any of them.

Password strength is measured in bits of entropy — the number of possible combinations an attacker would need to try. Each character you add roughly multiplies the total combinations. A 12-character password using all character types (uppercase, lowercase, numbers, symbols) has approximately 79 bits of entropy. A 20-character password has approximately 131 bits.

The strength meter on this tool evaluates length and character diversity. For most purposes, aim for 'Strong' or 'Very Strong'. Remember: a long password with moderate complexity beats a short password with high complexity every time.

Use a unique password for every account — never reuse passwords across services. Store them in a dedicated password manager like Bitwarden (free, open-source — bitwarden.com) or 1Password (paid, excellent UX — 1password.com). These tools generate, store, and autofill strong passwords so you never need to remember them. Enable two-factor authentication (2FA) wherever available.

Avoid using personal information (birthdays, names, addresses) in passwords. Avoid common substitutions (@ for a, 3 for e) that attackers already account for. And avoid common keyboard patterns (qwerty, 123456) which are the first things checked in any brute-force attack.

For maximum security on sensitive accounts, consider pairing a password manager with a hardware security key like a YubiKey for phishing-resistant 2FA.