Password Strength Checker

The tool analyzes your password against multiple criteria including length, character variety (uppercase, lowercase, numbers, special characters), and common patterns. It calculates a score from 0 to 100 and estimates how long it would take to crack using brute-force methods.

A strong password is at least 12 characters long and includes a mix of uppercase letters, lowercase letters, numbers, and special characters. It should avoid common words, sequential patterns like "abc" or "123", and repeated characters.

The crack time is based on the total number of possible combinations (character set size raised to the power of password length) divided by an assumed rate of 10 billion guesses per second, which represents a high-end modern attack scenario.

Yes! All processing happens entirely in your browser. Your password is never sent to any server. No data is collected, stored, or transmitted.

Entropy measures the randomness 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 modern brute-force attacks.