Secure Password Generator, Free and Built Into Your Vault

PassCryp's password generator creates cryptographically random passwords from 8 to 64 characters, with full control over symbols, numbers, and case. Generated passwords save to your end-to-end encrypted vault in one click.

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Cryptographically secure

Uses your browser's crypto.getRandomValues(), not Math.random(). True entropy, not pseudo-random.

Customizable length and symbols

8 to 64 characters, with toggle controls for uppercase, lowercase, numbers, and symbols.

Save to vault instantly

Generate, name, and store, your new password lives in an encrypted vault that syncs across devices.

Strength meter included

zxcvbn-powered strength estimation tells you exactly how resistant your password is to real attack tools.

Passphrase mode

Generate 4–8 random-word passphrases for master passwords and recovery codes, easier to remember, harder to guess.

Pronounceable mode

Optional pronounceable output for when you need to dictate a password over the phone.

What makes a password actually strong

Length beats complexity. A 20-character random password from a 90-character alphabet has ~130 bits of entropy, more than enough to resist any feasible offline attack. Adding obscure symbols below 16 characters helps less than just making the password longer.

Randomness matters more than length, though. A 30-character password that's a quote you love has maybe 40 bits of real entropy because it's in a dictionary an attacker has. PassCryp's generator uses your browser's CSPRNG (crypto.getRandomValues), the same source kernels use for TLS keys.

Uniqueness is the third leg. The biggest password risk in 2026 isn't a weak password, it's a reused one. When SiteA leaks plaintext, attackers credential-stuff SiteB. A unique generated password per site removes the entire class of attack.

How to use the generator inside the vault

Open the vault, click New Item, choose Login. The password field has a generator icon, click it and a panel slides out with length sliders and character-set toggles. Adjust, click Use, and the password is filled in. Save the item and it's encrypted to your vault.

The browser extension does the same thing in-page: when a signup form is detected, a small icon offers "Generate strong password". One click fills the form, prompts you to save, and the credential lands in your vault on submit.

For master passwords and recovery codes, switch the generator to Passphrase mode: 4–8 random words from the EFF long wordlist (each word ~12.9 bits of entropy). A 5-word passphrase has ~64 bits, strong against offline attack and memorable.

Common password generator mistakes

Using Math.random(). It is not cryptographically secure and its output is predictable from a small number of samples. Always use crypto.getRandomValues or a server-side CSPRNG.

Hand-modifying generated passwords. "P@ssw0rd" patterns are in every cracking dictionary. If you tweak a generated password, you're shrinking its entropy back toward zero.

Reusing a generator output as a master password. The master password should be a passphrase you can memorize. Use the generator's Passphrase mode, then practice typing it for a week before locking your vault.

Frequently asked questions

How long should my password be?

16+ random characters resists virtually all offline attacks. PassCryp defaults to 20 characters with full symbol set.

Is your password generator free?

Yes, fully free, no signup required to use the generator on this page. Save passwords to the vault with a free account.

Are generated passwords stored anywhere?

Only if you save them to your vault, where they're encrypted client-side before sync.

Can I generate passphrases instead?

Yes, switch to Passphrase mode for 4–8 random words from the EFF long wordlist. Great for master passwords.

Does the generator work offline?

Yes. It runs entirely in your browser using crypto.getRandomValues, no network call required.

What's the maximum password length?

64 characters in the generator, but PassCryp's vault accepts passwords up to 1024 chars for paste-in cases.

Ready to take control of your secrets?

Start a free zero-knowledge vault in under 60 seconds.

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