Password Strength Checker
Test how strong your password is — get a strength rating, entropy and an estimated crack time. 100% private.
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Check how strong a password is before you use it. You get a strength rating, the password's entropy in bits, and a rough crack-time estimate, plus specific tips to improve it. The password is checked entirely in your browser and is never sent anywhere.
How to use it
Type or paste a password and click Check strength. Need a strong one? Generate it with the Password Generator, then test it here.
Frequently asked questions
Is it safe to type my real password?
Yes. The check runs 100% locally in your browser using JavaScript — nothing is uploaded, logged or stored.
What makes a strong password?
Length above all — 12+ characters mixing upper and lower case, numbers and symbols, avoiding common words or patterns.