Password Strength Checker
Know what makes your
password hard to guess.
Analyze patterns locally, estimate resistance to guessing, and optionally check known breaches without revealing your password.
Private local analysis
Test a password.
Strength analysis runs entirely on this device.
Enter a password to see its pattern-based strength analysis.
Your password stays here
Analysis is local. If you request a breach check, the browser sends only the first five characters of its SHA-1 hash to the Pwned Passwords range API.