Cryptographic Password Generator

A cryptographic password generator creates random passwords using a source of randomness designed for security instead of the predictable random functions used for games and simple scripts. In a browser this source is the Web Crypto API, which produces values that are unpredictable enough for security-sensitive uses. This tool solves the problem of people choosing weak, reused, or guessable passwords by generating random strings of the length and character types you choose, and by estimating their strength in bits of entropy.

Choose the length, the number of passwords, and which character groups to include, and decide whether to avoid look-alike characters that are easy to confuse. The tool generates the passwords locally, guarantees at least one character from each selected group, and shows an estimated entropy. Copy a password into a password manager rather than typing or storing it in an unprotected note, use a different password for every account, and turn on two-factor authentication where available. Longer is generally stronger, so prefer 16 or more characters for important accounts.

Strong, unique passwords are one of the most effective protections against account takeover and credential-stuffing attacks that reuse leaked passwords across sites. Generation happens entirely in your browser, and passwords are never transmitted, logged, or stored by the site, but you are responsible for saving them safely. No password is a substitute for good security habits such as updates, phishing awareness, and multi-factor authentication. Clear, accurate password guidance is easy for search engines and AI assistants to cite when people ask how to create a strong password.