Password Generator

A strong password has four key characteristics: length (16+ characters recommended), complexity (mix of character types), randomness (no patterns or dictionary words), and uniqueness (different for every account). Our generator creates passwords that meet all these criteria.

For most accounts, 12-16 characters with mixed character types provides excellent security. For critical accounts like email, banking, or password managers, use 20+ characters. The longer the password, the exponentially harder it is to crack.

Yes, absolutely. Our generator runs entirely in your browser using JavaScript and the Web Crypto API. Your passwords are never sent to any server, logged, or stored. All generation happens locally on your device, making it completely private and secure.

Entropy measures password randomness in bits. It represents the number of guesses needed to crack the password. Each bit doubles the difficulty. A 128-bit entropy password has 2^128 possible combinations, making it virtually impossible to crack with current technology.

We estimate crack time assuming an attacker can make 100 billion guesses per second (state-of-the-art hardware). The calculation divides total possible combinations by guesses per second. Real-world crack time depends on the attacker's resources and methods.

Passphrases are excellent for passwords you need to remember and type frequently, like your master password. A 4-5 word passphrase provides strong security while being much easier to remember. Use random passwords for accounts managed by a password manager.

When one service is breached, attackers try those credentials on other sites (credential stuffing). If you reuse passwords, one breach compromises all your accounts. Use unique passwords for every account and a password manager to keep track of them.

Special characters increase the character pool and entropy, making passwords harder to crack. However, a longer password with just letters can be equally secure. For example, a 20-character all-lowercase password has similar entropy to a 12-character password with all character types.

Use a reputable password manager like Bitwarden, 1Password, or KeePass. They encrypt your passwords with a master password, sync across devices, and can auto-fill login forms. Never store passwords in plain text, browsers without a master password, or sticky notes.

Modern security guidance no longer recommends regular password changes for their own sake. Change passwords immediately if: you suspect compromise, a service reports a breach, you've shared the password, or you've used it on a public computer. Otherwise, strong unique passwords can remain unchanged.