How strong is your password? Find out instantly.
A strong password is your first line of defense against unauthorized access. Here's what makes a password strong:
Our password strength checker analyzes multiple factors:
Yes. This tool runs entirely in your browser using JavaScript. Your password is never transmitted over the internet, stored, or logged anywhere. You can verify this by checking the page source code or using your browser's network inspector.
At minimum 12 characters, but 16+ is recommended. Each additional character makes your password exponentially harder to crack. A 16-character password with mixed character types would take millions of years to brute-force.
Absolutely. A password manager lets you use unique, strong passwords for every account without memorizing them. Popular options include 1Password, Bitwarden, and KeePass.
Entropy measures the randomness (unpredictability) of a password in bits. Higher entropy means more possible combinations an attacker must try. A password with 80+ bits of entropy is considered very strong against current brute-force technology.
Modern GPU clusters can test over 10 billion password combinations per second against common hash types. This is why short, simple passwords can be cracked in seconds, while long, complex ones would take millions of years.