Passwords & Auth100% In-BrowserEntropy Meter
Password Strength Checker
Test password entropy, crack time estimation, dictionary vulnerability, and NIST 800-63B compliance.
Real-time processing·No server uploads·Zero telemetry
password-strength-checker
LIVE
Enter password to analyze
23
Length
3
Upper
3
Digits
1
Symbol
Pattern Analysis
Common password pattern detected — appears in breach databases
Excellent length (≥16 characters) — greatly increases brute-force resistance
Full character variety — uppercase, lowercase, digits, and symbols present
How to Use Password Strength Checker
01
Type or paste a password into the test field.
02
Inspect the live score, entropy bits, character variety, and brute-force time estimate.
03
Review recommendations to eliminate vulnerabilities.
Privacy Guarantee
Password Strength Checker runs 100% client-side in your web browser. Your data, passwords, keys, and files are processed using the Web Crypto API and never transmitted to any server. Zero telemetry, zero storage, zero cloud processing.
Frequently Asked Questions
Is it safe to test my real password here?
Yes! Testing is performed 100% client-side in your web browser using JavaScript. No passwords are ever transmitted or saved.
Discover More