STR
Password Strength Tester
Estimate password strength with entropy scoring and common-pattern detection. Runs locally — your password is never transmitted.
Runs entirely in your browser · Your input is never transmitted
PASSWORD
0 charsIdle
How to use
- Type a password.
- See entropy, score, and guesses-to-crack.
Frequently asked
What do scores mean?
0=trivial, 1=weak, 2=fair, 3=strong, 4=excellent. Assumes an offline attack with modern GPU — add 1 score for online-only.