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Check how strong your password is and get suggestions for improvement.
Use this password strength checker to review a password's approximate strength score, entropy estimate, and common improvement suggestions.
It is helpful for spotting weak patterns before a password gets reused anywhere important, but it should still be treated as an educational estimate rather than a certification.
Learn how password length, character variety, reuse, and common patterns affect practical password strength.
Choose the right security utility for passwords, hashes, certificate review, DNS checks, and domain lookups instead of expecting one browser tool to do a full security audit.
Format and review WHOIS fields with links to live lookup services.
Review SSL/TLS certificate fields and expiry dates with a browser-based educational checker.
Generate SHA-256 cryptographic hashes for secure data verification.
Generate HMAC (Hash-based Message Authentication Code) for API authentication.
Generate MD5 hash values for text strings and verify file integrity.
Generate strong, random passwords with customizable length and character types.
About Password Strength
This tool evaluates password strength based on length, character variety, uniqueness, and common patterns. It calculates entropy (a measure of randomness) and estimates how long it would take to crack your password using brute force at 10 billion guesses per second. Your password never leaves your browser.