Password Strength Checker

Estimate password strength, entropy, length and character-set diversity locally. Free to use online with no sign-up. Fast and mobile-friendly.

This quick checker does not upload or store your password. It provides guidance, not a guarantee against compromise.

Example

Long unique passphrases generally outperform short complex-looking passwords.

Frequently asked questions

Is the password strength checker free to use?: Yes. The tool is free to use and does not require an account.
Is my input stored?: For browser-based tools, your input stays on your device. The URL shortener is the exception because short links must be stored to redirect later.