💪 Password Strength Checker

How to Check Password Strength

Type your password to see its strength rating, estimated crack time, entropy bits, and character analysis. Get suggestions to make it stronger. Your password never leaves your browser.

What makes a strong password?

At least 12 characters, mix of uppercase, lowercase, numbers, and symbols. Avoid dictionary words, personal info, and common patterns like "123456" or "password".

What is entropy?

Entropy measures randomness in bits. Higher entropy = harder to crack. A 12-char password with all character types has ~78 bits of entropy — enough to resist brute force attacks.