Generate strong, cryptographically secure random passwords instantly. Customize length and character sets. Never leaves your browser.
Unlike most online password generators that use Math.random(), our generator uses the Web Cryptography API's crypto.getRandomValues() function — the same cryptographic-grade randomness used by security software. This means your passwords are truly unpredictable. All generation happens locally in your browser; no password is ever transmitted to our servers. Use it to generate strong passwords for email, banking, social media, and any account that needs protection.
A strong password is long (at least 16 characters), uses a mix of uppercase letters, lowercase letters, numbers, and symbols, avoids common words or patterns, and is unique to each account. Our password generator creates strong passwords automatically — just set your desired length and character sets.
Password security comes from two factors: length and character set size. A 16-character password using all character types has 95^16 possible combinations — an astronomically large number. Our entropy calculator shows you exactly how strong your password is in bits.
Yes. Our password generator uses crypto.getRandomValues() — the browser's cryptographically secure random number generator — not Math.random(). All generation happens entirely in your browser. The password is never sent to any server.
For most accounts, 16 characters is a good minimum. For highly sensitive accounts (banking, email), use 20+ characters. Our generator defaults to 16 characters, which provides over 60 bits of entropy — considered Very Strong.
Entropy bits measure password strength mathematically. It represents log2(charset_size^length) — the number of bits needed to represent all possible passwords of that length and character set. More bits means more possible combinations and a stronger password. Under 28 bits is Weak; 60+ bits is Very Strong.