Password Strength Checker

The tool evaluates your password on length, character diversity (uppercase, lowercase, digits, special characters), and checks for common weak patterns like dictionary words and keyboard sequences. It produces a score from 0 to 100 and labels your password from "Very Weak" to "Very Strong."

A strong password should be at least 12 characters long and combine uppercase letters, lowercase letters, numbers, and special characters. Avoid common words, sequential patterns like "123" or "abc", and personal information. Using a randomly generated passphrase is one of the most secure approaches.

The estimate calculates the total number of possible character combinations and divides by 10 billion guesses per second, simulating a modern GPU-accelerated attack. Real-world cracking speed depends on the hashing algorithm used, so treat the estimate as a relative strength indicator.

Yes. Your password is checked entirely in your browser and is never transmitted over the network. No data is logged, stored, or sent to any server. You can even disconnect from the internet after loading the page and the tool will still work.

Password entropy measures randomness in bits. Each additional bit doubles the number of guesses an attacker needs. Aim for at least 60 bits for everyday accounts and 80+ bits for high-security credentials like banking or admin passwords.