Password Strength Checker
Check your password strength with real entropy, length and character-class scoring — checked in your browser only — free, fast and private.
Type a password to see its strength. It is never uploaded or stored.
How to use Password Strength Checker
- Type a password into the box — it never leaves your browser.
- Read the score, entropy and estimated crack time.
- Use a longer password with mixed character types if the score is low.
- Never reuse a strong password across important accounts.
Note: this check runs entirely in your browser — your password is never uploaded or stored. Crack time is a rough estimate assuming 10 billion guesses per second.
Frequently Asked Questions
Is my password sent anywhere?
No. The check runs entirely in your browser. The password is never uploaded, stored or logged.
Is the Password Strength Checker free?
Yes, it is 100% free with no sign-up. Your data stays in your browser.
Do I need to install anything?
No. It works in any modern browser on phone, tablet or computer.
Is my data uploaded?
No. This tool runs entirely in your browser and your input is never uploaded to a server.