12 Character Password Generator

The generator above already defaults to 12 characters, so you don't need to touch the length slider. Every character comes from crypto.getRandomValues(), the Web Crypto API's cryptographically secure random source. Rejection sampling keeps each character in the pool equally likely to appear.

Turn character types on or off to match what a website accepts. Click Generate 12 Character Password for a new one and use Copy to place it on your clipboard. Nothing you generate is transmitted anywhere. It exists only in your browser until you paste it.

A 12-character password is simply a password made of exactly 12 characters. Those characters can come from uppercase letters, lowercase letters, numbers and symbols in any combination. The password K7#mQ2vX9pL4 mixes all four types across its 12 positions.

That string is an example only. Generate your own with the tool above rather than using it.

Each character type you enable adds more possible characters to the pool that each of the 12 positions is drawn from. A bigger pool means more possible passwords at the same length. But pool size is only one factor. Length matters too. So does true randomness and never reusing the password.

Check the Symbols option above to include special characters in your 12-character password. This is worth doing when the target website allows it. Not every site does, and some reject specific symbols. Quotes, backslashes and ampersands are common exceptions.

If a generated password gets rejected, open Advanced Options and list the characters to exclude, then generate again. The result still comes out at exactly 12 characters. Only the character pool changes.

A random 12-character string like xK7#pQ9!mR2@ isn't built to be memorable. That's a separate goal from raw randomness. If you need something you can actually recall, a word-based approach usually works better:

• Word-based password. Real words combined with numbers and symbols, in a pattern like word-word-12. Try the word password generator.
• Passphrase. Several random words strung together, like flame-river-bolt-echo. A genuine passphrase built for real security usually runs longer than 12 characters, since it's measured in words rather than characters. Try the passphrase generator.
• Memorable password. Tuned for recall first. The trade-off is explained honestly on the memorable password generator.

If you use a password manager for most accounts, a random 12-character string works fine since you never need to remember it. Save the memorable options for the handful of credentials you genuinely have to type from memory.

These two terms get used interchangeably, but they're not the same thing. A digit is specifically a number (0-9). A character can be a letter, a number, or a symbol.

A randomly generated 12-character password using all four character types has roughly 78 bits of entropy. Under a common offline-attack assumption of 10 billion guesses per second against a fast unsalted hash, that works out to an average of around 480,000 years to exhaust. That's a substantial margin over a short or predictable password. It's also the security level most password-strength meters label "Strong."

It isn't the ceiling though. Security in practice depends on several things working together:

• Randomness. The estimate above assumes true randomness. A human-typed "random" 12 characters is far weaker than what this generator produces.
• Uniqueness. A strong password reused on another site gets exposed the moment that other site is breached.
• Where it's stored. A great password left in a plain text note loses the benefit entirely.
• Phishing and malware. No password length protects you from typing it into a fake login page or a keylogger catching it.
• Account protections. Two-factor authentication, where available, protects you even after the password itself gets exposed.

None of that makes 12 characters insufficient. When a service requires or limits you to 12, a randomly generated one from this tool is a strong choice. Just don't treat length alone as the whole story.

Every extra character multiplies the number of possible passwords. That's why longer passwords generally beat shorter ones built from the same character types. There's no single length that's universally correct. Different services set different minimums and maximums, and 12 characters is a common, well-supported choice across most websites.

When a service allows longer passwords, especially for a high-value account like your primary email or banking, a longer randomly generated password gives you more margin. Our strong password generator defaults to 20 characters for exactly that reason. A password manager makes it practical to remember a longer, unique password for every account. See How Long Should a Password Be? for length guidance by account type.

If the same password protects your email, a shopping account and a social media login, a breach at any one of them puts the others at risk. Attackers automatically try leaked email and password pairs against other popular sites, a technique called credential stuffing. A strong 12-character password reused everywhere is only as safe as the weakest site storing it.

Generate a fresh password for each account and keep them in a password manager instead of memorising or reusing them. Check whether a password you're already using has been exposed with our password leak checker. Read more in Why You Need Unique Passwords.