Password Strength Estimator Tool Shows How Character Choices Affect Crack Time

A browser-based password strength calculator has been developed to help users understand how password length and character variety affect resistance to brute-force attacks. The tool analyzes factors such as character pool size, estimated entropy, and hypothetical attacker hardware scenarios to illustrate how small password changes can dramatically alter theoretical crack times. Designed purely for education, it advises users to test fictional passwords rather than real ones to protect their privacy. The tool acknowledges its limitations, noting it cannot account for real-world factors like breached credential databases, weak hashing algorithms, or pattern-based guessing. Its guidance aligns with recommendations from security bodies like NIST and OWASP, which emphasize rate limiting, salted adaptive hashing, and multi-factor authentication over simple password composition rules.