Regex Tester & Validator

This regex enforces password complexity by requiring a minimum length of 8 characters, at least one digit, and at least one special character (non-word and non-whitespace). It uses positive lookaheads to verify the presence of the required character types without consuming the string, allowing for a final match of 8 or more characters. It is ideal for validating user passwords in web applications or databases to ensure they meet baseline security criteria.