Password Strength Checker
Check how strong your password is in real-time. Get instant feedback, improvement tips, and estimated crack time — all processed securely in your browser.
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Your privacy is protected. Your password is never sent to any server — all strength checking happens entirely in your browser.
Frequently Asked Questions
Is this tool safe to use?
Absolutely. Your password never leaves your browser. All analysis is performed locally using JavaScript — no data is transmitted to any server.
How is password strength calculated?
We evaluate length, character variety (uppercase, lowercase, numbers, special characters), common patterns, and dictionary words to produce a comprehensive strength score.
What is the estimated crack time?
It's an approximation based on 10 billion guesses per second (modern GPU-assisted attack). Actual times vary based on the attacker's resources.
How long should my password be?
We recommend at least 12 characters, but 16+ characters provides significantly stronger protection against brute-force attacks.
Why Password Security Matters
Weak passwords are the leading cause of data breaches. Over 80% of hacking-related breaches involve stolen or weak credentials. A strong, unique password for each account is your first line of defense against unauthorized access to your personal and financial information.
Our free password strength checker analyzes your password against multiple criteria including length, character diversity, common patterns, and dictionary words to give you an accurate assessment of your password's security level.