Security Tool
Secure Password Strength Meter
Free password strength meter. Instantly analyze password entropy, estimated crack time, and security score. 100% private — nothing is sent anywhere.
Start typing a password to see its strength.
Everything happens instantly in your browser.
Is This Safe to Use?
Yes. 100% yes. This tool processes everything entirely on your own device using client-side JavaScript. Your password is NEVER sent over the internet, stored in a database, or saved in logs. You can even disconnect your internet right now, and the tool will still work perfectly.
How We Calculate Crack Time
We calculate the "entropy" (randomness) of your password by looking at its length and the size of the character pool used (lowercase, uppercase, numbers, symbols). We then estimate the crack time assuming a modern offline brute-force attack capable of guessing 10 billion passwords per second.