Type your password
The field never submits anywhere — scoring happens instantly with JavaScript on your device.
Password Strength Checker
Type a password to score its strength and see exactly which weaknesses to fix. Everything runs locally — nothing is ever transmitted or stored.
Enter a password
•At least 12 characters
•Contains uppercase letter
•Contains lowercase letter
•Contains a number
•Contains a symbol
•Not a common password
How it works
Watch the score update
An entropy estimate combines length and character variety, then subtracts points for risky patterns.
Fix the flagged weaknesses
Each warning names a specific, fixable problem — a repeated run, a keyboard pattern, or a common password.
FAQ
Is my password sent anywhere?
No. Everything is calculated locally with JavaScript in your browser. The password is never transmitted, logged or stored.
How is the strength score calculated?
It estimates entropy from the character pool and length, then subtracts points for patterns like common passwords, repeated characters, keyboard runs and simple sequences.
Does a high score mean the password wasn't leaked in a breach?
No. This tool only checks the password's structure — length, variety and predictable patterns. It cannot know whether that exact password has appeared in a data breach.