Create cryptographically secure random passwords with one click. Generated locally with your browser's secure random engine — your password never leaves your device. 🔐
Crypto-secure randomness
🔒 Passwords are generated with crypto.getRandomValues entirely on your device and never leave your browser. We do not see, store, or transmit them.
Built on the browser's crypto.getRandomValues CSPRNG — never the predictable Math.random.
See exactly how many bits of entropy your settings produce, from Weak to Excellent.
Everything runs in your browser. Your password is never sent, logged, or stored anywhere.
Password strength comes down to one number: entropy, measured in bits. Each extra character multiplies the number of guesses an attacker must make. A random password drawn from uppercase, lowercase, numbers, and symbols has roughly 6.5 bits of entropy per character — so a 16-character random password exceeds 100 bits, far beyond what modern GPU cracking rigs can brute-force, while an 8-character one (about 52 bits) can fall in hours when a site's password database leaks.
Current NIST guidance (SP 800-63B) favors length over forced complexity rules: long, random, and unique beats "P@ssw0rd1!" tricks every time. NIST also recommends dropping mandatory periodic resets and screening passwords against known-breach lists. The practical takeaway for US users in 2026: generate a unique random password for every account, store them in a reputable password manager, and turn on two-factor authentication (ideally passkeys or an authenticator app) for email, banking, and anything tied to your identity.
For master passwords you must memorize, consider a passphrase instead — four to six random words ("correct horse battery staple" style) are easier to remember yet still high-entropy. For everything else, a generated string from this tool is ideal because you never have to remember it. The "exclude ambiguous" option removes look-alike characters (0/O, 1/l/I, |) so passwords you occasionally have to read or type by hand — Wi-Fi keys, TV logins — stay error-free.
This generator runs entirely client-side using the Web Crypto API with unbiased rejection sampling, so the result is statistically uniform and never leaves your browser. There is no server round-trip, no analytics on the generated value, and nothing to intercept.