Password Strength Checker
Check how strong your password is. Get detailed analysis, crack time estimates, and suggestions for improvement.
Your password is checked locally in your browser. It is never sent to any server.
Why Check Your Password Strength?
Weak passwords are the leading cause of security breaches. Our tool analyzes your password against multiple criteria including length, character variety, common password lists, and pattern detection. Get instant feedback on how to make your passwords stronger and protect your accounts.
Frequently Asked Questions
Is my password sent to your servers?
No. All password analysis happens locally in your browser using JavaScript. Your password never leaves your device and is not transmitted over the internet.
What makes a strong password?
A strong password is at least 12 characters long, uses a mix of uppercase, lowercase, numbers, and symbols, and avoids common words, patterns, and personal information.
How is crack time calculated?
We estimate crack time based on the character set size and password length, assuming a modern GPU capable of 10 billion guesses per second. This is a theoretical estimate for brute-force attacks.
Should I use a password manager?
Yes! Password managers let you use unique, strong passwords for every account without memorizing them. They're one of the best security investments you can make.
How often should I change my passwords?
Change passwords immediately if you suspect a breach. Otherwise, use strong unique passwords and enable two-factor authentication rather than changing passwords frequently.