Password Strength Checker
Check your password strength and security score instantly in your browser.
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Secure Password Strength Estimator
Test the strength of your passwords without sending them over the internet. Our tool uses the industry-standard `zxcvbn` library to estimate how long it would take to crack your password. It analyzes entropy, dictionary words, and common patterns to provide a realistic security score. Because it runs entirely in your browser, your secret passwords represent zero risk of being intercepted.
How it Works
- 1Type a password into the masked input field.
- 2See an instant score (0-4) and a crack-time estimate.
- 3View feedback on specific weaknesses (e.g., 'common name').
- 4Toggle visibility to check your typing.
- 5Rest assured: NO network requests are made.
Key Features
Zxcvbn-powered entropy analysis.
Crack time estimation (offline vs online scenarios).
Actionable feedback to improve complexity.
Zero network latency.
100% Client-side privacy guarantee.
Common Use Cases
Security Audits: Check if your typical passwords are safe.Education: Teach users what makes a strong passphrase.Account Setup: Verify a new password before using it.Compliance: Ensure passwords meet length/complexity policies.
Frequently Asked Questions
Everything you need to know about using this tool effectively and securely.
Q.Is it really safe to type my password here?
Yes. This page is static HTML/JS. We do not have a backend database to store passwords, and no network request containing your password is ever sent.
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