Test your password security instantly with real-time entropy analysis and crack time estimates. Get actionable feedback on length, character diversity, and patterns to create stronger, more secure passwords.
A password strength checker evaluates how resistant your password is to guessing and brute-force attacks. In an era of increasing cyber threats, using strong passwords is one of the most important steps you can take to protect your online accounts, personal data, and digital identity.
Password strength is determined by several factors: length, character variety (uppercase, lowercase, numbers, symbols), and unpredictability. A longer password with mixed character types is exponentially harder to crack than a short, simple one. For example, an 8-character password using only lowercase letters has about 200 billion combinations, while a 12-character password with mixed types has over 95 trillion combinations.
The password 'P@ssw0rd2024!' scores as strong with approximately 71 bits of entropy. It would take a modern GPU cluster billions of years to crack through brute force. However, it follows a common pattern and might be vulnerable to dictionary attacks. A better approach: 'correct-horse-battery-staple' style passphrases that are long but memorable.