Password Strength Checker
Test password strength and get security recommendations. Check for common patterns, dictionary words, and entropy. 100% client-side — your password never leaves your device.
Secure: Processing happens in your browser.
StrengthEnter Password
Requirements
At least 12 characters
Uppercase letter (A-Z)
Lowercase letter (a-z)
Number (0-9)
Symbol (!@#$%)
Frequently Asked Questions
How is password strength calculated?
Based on length, character variety (upper, lower, numbers, symbols), and absence of common patterns.
Is my password sent to a server?
Never. All checking happens locally in your browser. Your password stays completely private.
What makes a strong password?
12+ characters, mix of uppercase, lowercase, numbers, symbols. Avoid dictionary words and patterns.
Can this check if my password was leaked?
This checks strength only. For breach checking, use haveibeenpwned.com (using k-anonymity).