Generate uncrackable passwords, memorable passphrases, and PINs — then check how long they'd take to crack. 100% client-side, nothing ever leaves your browser.
If one account gets breached, every account sharing that password is compromised. A password manager makes this practical.
A 20-character password with just lowercase letters is stronger than an 8-character password with all character types. When in doubt, make it longer.
Random word combinations are both strong and memorable. Use 5+ words for serious security. Great for master passwords you type frequently.
Data breaches happen constantly. If your email and bank share a password, one breach exposes both. Use a password manager.
Even the strongest password can be phished. 2FA adds a second layer requiring physical access to your phone or security key.
This tool uses your browser's built-in Cryptographic Random Number Generator (CSPRNG) — specifically crypto.getRandomValues() — to generate passwords. This is the same source of randomness used by operating systems, encryption software, and professional security tools.
For random passwords: The tool builds a character pool from your selected options, then picks characters using the CSPRNG. A Fisher-Yates shuffle ensures required characters are distributed randomly throughout.
For passphrases: Words are selected from the EFF's curated wordlist of 7,776 common English words. Each word adds approximately 12.9 bits of entropy.
For strength checking: We use zxcvbn, an open-source library from Dropbox that detects dictionary words, common names, dates, keyboard patterns, l33t speak, and repeated characters — simulating how attackers actually crack passwords.
Yes. This tool generates passwords entirely in your browser using the Web Crypto API (crypto.getRandomValues()), the same CSPRNG used by password managers and security software. No passwords are transmitted to any server, stored in any database, or logged in any way.
We use your browser's built-in CSPRNG via crypto.getRandomValues(). This draws entropy from your operating system's random number generator, which collects randomness from hardware events. The output is unpredictable even to someone who knows the algorithm.
Security experts now recommend a minimum of 16 characters for important accounts. For most people, 16-20 characters with all character types provides excellent security. For maximum protection, use 20+ characters or a 5-6 word passphrase.
A passphrase is a password made of random words, like "correct-horse-battery-staple." A 5-word passphrase from the EFF wordlist has approximately 64.6 bits of entropy — roughly equivalent to a 10-character fully random password. A 6-word passphrase (~77.5 bits) is stronger than most 12-character random passwords.
Entropy measures how unpredictable a password is, expressed in bits. Each bit doubles the number of possible passwords an attacker would need to try. For reference: 40 bits is weak, 60 bits is moderate, 80 bits is strong, and 128 bits is effectively uncrackable.
The strength analysis runs entirely in your browser using zxcvbn, an open-source library created by Dropbox. No data is sent to any server. You can verify this by opening your browser's network tab while using the checker.
Traditional rules check for character variety, but attackers know those rules. A password like "P@ssw0rd!" passes most requirements but is trivially common. Our checker uses zxcvbn, which evaluates passwords the way real attackers do — looking for dictionary words, substitutions, and predictable structures.
Online attacks target live services that limit attempts. Offline attacks happen when an attacker steals a hashed password database and can try billions of guesses per second on their own hardware. This is why strong passwords matter most for protecting against database breaches.
Absolutely. A password manager lets you use unique, strong passwords for every account without memorizing them. Popular options include Bitwarden (free, open-source), 1Password, and KeePass.
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