Test your password security instantly. Get detailed analysis, improvement suggestions, and estimated crack time.
Our Password Strength Checker provides comprehensive analysis of your password security. Get instant feedback on password strength, estimated crack time, and actionable suggestions to improve your password security - all with complete privacy in your browser.
Password strength is determined by multiple factors that work together to create secure passwords:
Every additional character exponentially increases the number of possible combinations. A 12-character password has 95^12 possible combinations vs 95^8 for an 8-character password.
Using multiple character types (uppercase, lowercase, numbers, symbols) increases the "character set size" that attackers must try, making brute-force attacks much more difficult.
Avoiding patterns, dictionary words, and personal information makes passwords harder to guess through dictionary attacks or social engineering.
Using the same password across multiple accounts creates a single point of failure. If one account is compromised, all accounts become vulnerable.
The estimated crack time is calculated based on:
Understanding the current password security landscape helps appreciate why strong passwords matter:
Absolutely! All password analysis happens 100% locally in your browser. No data is sent to any server, and nothing is stored. Your password never leaves your computer.
Estimates are based on worst-case brute-force scenarios. Real-world attacks might be faster (using dictionary attacks) or slower (account lockouts, rate limiting). The estimates provide a good relative comparison between passwords.
Length is generally more important than complexity. A 16-character password with only lowercase letters has more possible combinations than an 8-character password with all character types. Aim for both when possible.
Yes! Passphrases (like "correct horse battery staple") are easier to remember and can be more secure than complex passwords. Their length provides excellent security, and they're resistant to dictionary attacks when random words are used.
For most accounts, every 3-6 months is recommended. For critical accounts (email, banking), consider more frequent changes. However, using strong, unique passwords is more important than frequent changes of weak ones.
Yes! Password managers help you generate and store strong, unique passwords for all accounts. They're more secure than reusing passwords or writing them down, and they make using complex passwords practical.