Password Generator

What Makes a Password Strong

Length matters more than most people think, a longer password is exponentially harder to crack than a shorter one, even if the shorter one uses unusual characters. Every additional character multiplies the number of possible combinations an attacker would need to try. Character diversity, mixing uppercase, lowercase, numbers, and symbols, adds further strength on top of length by widening the pool of possible characters at every position. The weakest passwords combine short length with predictable patterns: dictionary words, keyboard sequences like "qwerty," birthdays, or names of pets and family members, all of which are among the first things password-cracking tools try.

Why This Tool Uses crypto.getRandomValues()

Many simple password generators rely on JavaScript's Math.random() function, which is fast but not cryptographically secure, it uses a predictable algorithm that, in some cases, can be reverse-engineered to guess future "random" values. This tool instead uses the Web Crypto API's crypto.getRandomValues(), which pulls randomness from your operating system's cryptographically secure random number generator, the same quality of randomness used for encryption keys. That means every character in your generated password is genuinely unpredictable, not just statistically scattered.

Passwords vs. Passphrases

A strong random password, like the ones this tool generates, packs maximum unpredictability into a relatively short string, ideal when you're going to save it in a password manager and never type it by hand. A passphrase, by contrast, strings together several unrelated words (for example, "correct horse battery staple") into something longer but easier for a human to remember and type. Passphrases can be just as secure as random passwords if they're long enough and the words are genuinely random, but they're a different tool for a different job: memorability versus maximum entropy in minimum length.

Using a Password Manager

• Generate a unique, random password for every account. Reusing passwords means a breach on one site can compromise every other account that shares it.
• Store generated passwords in a reputable password manager instead of a notes app or sticky note, so you never need to remember them yourself.
• Use this generator's strength indicator as a guide, but remember that even a "strong" password becomes weak if it's reused or shared.
• Enable two-factor authentication wherever it's offered, it protects you even if a password is somehow leaked.