Password Strength Checker

Check how strong your password is, estimate the time to crack it and get tips to improve it.

Your files never leave your device

Private: runs in your browser
Free, with no daily limits
No sign-up, no watermark
Works offline once loaded

How to use Password Strength Checker

1Type a password into the box.
2See its strength, entropy and crack time.
3Follow the tips to make it stronger.

Why use this password strength checker

Entropy and crack-time estimate
Spots common passwords and patterns
Clear tips to improve
Never leaves your browser

Most online tools upload your file to their server, process it there and then make you pay to remove limits. This one does the work inside your browser tab instead — so it is faster, it is free for us to run, and your document stays with you.

Questions about Password Strength Checker

Is it safe to type my real password here?

The check runs entirely in your browser and nothing is sent or stored. Still, the safest habit is to test a password that is similar to yours rather than the real one.

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