Password Strength Checker
See how strong a password really is — entropy, crack time, common-password and pattern checks, with tips.
About Password Strength Checker
This password strength checker online shows how strong a password really is. Type or paste it and you see the strength rating, entropy in bits and an estimated crack time. It also checks for common passwords, keyboard patterns, repeated characters and predictable tricks like a capital first letter and a number at the end.
Clear suggestions tell you how to make it stronger, usually by making it longer. The check runs entirely in your browser, so the password is never sent anywhere. It is free, with no sign-up, and handy before you set a new banking, email or social media password.
How to use Password Strength Checker
- Type or paste a password into the box.
- Read the strength, entropy and estimated crack time.
- Check the problems found and follow the suggestions.
Frequently asked questions
Is it safe to type my real password here?
The check runs entirely in your browser — nothing is stored, logged or sent. Still, for maximum safety you can test a similar password instead of your real one.
What is entropy?
Entropy (in bits) measures how many guesses an attacker needs. Each extra bit doubles the work. Under 40 bits is weak; 60–80 is strong; above 80 is very strong.
Why is “India@123” weak even with a symbol?
Attackers start with lists of common passwords and simple variations such as capital letters, @ for a and trailing numbers. Predictable changes add very little strength.
How do I know if my password is strong?
Type it here. A strong password is long, has no common words or patterns, and shows a crack time of centuries or more.
What makes a password weak?
Short length, dictionary words, names, dates, keyboard runs like qwerty, and predictable swaps like @ for a. Length adds the most strength.
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