Secure Password Generator

Generate strong random passwords with control over length and character sets. Generation uses the browser's cryptographic random number source, and nothing is transmitted or stored.

Length matters more than complexity

Each additional character multiplies the number of possibilities an attacker must try, and that multiplication compounds far faster than adding symbol variety to a short password. A twelve-character password is dramatically harder to brute-force than an eight-character one, and the gap widens enormously at sixteen. If you change one thing about your passwords, make them longer. Sixteen characters is a reasonable modern default for anything generated rather than memorised.

Why "P@ssw0rd1!" fails every requirement test it passes

It satisfies the classic rules — uppercase, lowercase, number, symbol, eight characters — and is among the first things any real attack tries. Attackers do not guess randomly. They start with lists of leaked passwords, then apply the exact substitutions humans predictably make: a becomes @, o becomes 0, append a number, append an exclamation mark. Those transformations are built into cracking tools, so a predictable pattern applied to a common word adds almost nothing. Randomly generated strings avoid this entirely because there is no underlying word and no pattern to exploit.

Reuse is the real vulnerability

Here is the uncomfortable part: password strength often does not matter, because the most common route to a compromised account has nothing to do with guessing. When a company suffers a breach, attackers obtain email and password pairs, then try those same pairs on banks, email providers and shopping sites automatically and at enormous scale. This is credential stuffing, and it works because most people reuse passwords. A perfect password used across ten sites is weaker in practice than ten mediocre passwords used once each. This is the argument for a password manager: it makes unique passwords everywhere practical, since you only memorise one.

Quick tips

• Generate a unique password per site and store them in a password manager.
• Turn on two-factor authentication for important accounts; an authenticator app beats SMS.
• Stop rotating passwords on a schedule — change them when there is a reason to.
• Nothing generated here is logged or transmitted; close the tab and it is gone.

How secure are the generated passwords?

Passwords are created using browser cryptographic randomness (crypto.getRandomValues), ensuring high entropy and unpredictability.

Are my generated passwords stored anywhere?

Never. Passwords exist only in your current session memory and disappear as soon as you close or refresh the page.