Generate strong random passwords
Built & maintained by Pappu Venkata Subbi Reddy, founder of Clacify
The Password Generator creates strong, random passwords that resist brute-force and dictionary attacks. Choose the length and which character types to include — uppercase, lowercase, numbers, and symbols — and it generates a password using your browser's cryptographically secure random number generator. It also shows an estimated strength so you can see the benefit of adding length and variety. The single most effective defence against account compromise is a long, unique, random password for every site, ideally stored in a password manager. Because generation happens locally and nothing is transmitted, the passwords you create are never seen by any server.
Passwords are built by drawing characters from the pool you enable (uppercase A–Z, lowercase a–z, digits 0–9, and symbols) using the Web Crypto API's getRandomValues, a cryptographically secure pseudo-random number generator — far safer than Math.random for security purposes. Strength is gauged from entropy, calculated as length × log2(pool size): each added character and each enabled character set increases the number of possible combinations exponentially, which is why a 16-character mixed password would take astronomically long to brute-force. Generation is entirely local; no password is ever transmitted, logged, or stored.
A strong password is at least 12 characters long and includes a mix of uppercase letters (A–Z), lowercase (a–z), numbers (0–9), and special symbols (!@#$%). It should not contain your name, birthday, or common words. A 16-character random password with all character types would take billions of years to crack by brute force.
Yes, on Clacify. Our password generator uses your browser's built-in cryptographic random number generator (crypto.getRandomValues) and runs 100% locally — generated passwords are never sent to any server, stored in any database, or logged anywhere.