Password Strength Checker: A tool or software that evaluates the strength of a password based on certain criteria, such as length, complexity, and randomness. It analyzes the password to determine how resistant it is to common attacks like brute force, dictionary, or pattern-based cracking methods. A password strength checker typically provides feedback or a rating (e.g., weak, moderate, strong) and suggests improvements, such as adding numbers, special characters, or increasing the password length. The goal is to help users create secure passwords that are less likely to be compromised.