Password Strength Checker
Type a password, see its estimated strength, crack time and weak patterns — checked locally on your device.
About this tool
Estimates strength via entropy (character types + length), then checks for weak patterns — common passwords, sequences, repeats — that make a password far easier to guess than its length alone suggests.
Privacy & limitations
Runs entirely in your browser — nothing is sent anywhere. The crack-time is only an approximation and can't detect if a password has already leaked in a breach. Use a password manager regardless of the score.