Free Password Strength Analyzer
Test your password security instantly. Check strength, detect weaknesses, and see if your password has been breached. 100% free, private, and works in your browser.
Password Security Analysis Tool
Check if your password is strong enough to resist hacking attempts
Enter Password to Analyze
Tip: Try testing common passwords like "password123" or "qwerty" to see how weak they are
Password Security Score
Based on multiple security factors and breach data
Security Vulnerabilities Detected
Enter a password to detect security weaknesses and patterns
Character Analysis
Password character analysis will appear here
lightbulb Security Recommendations
Enter your password to get personalized security tips
We'll analyze your password and suggest specific improvements
Quick Security Tests
Your Privacy is Protected
This tool works entirely in your browser. We never store, transmit, or see your passwords. Breach checking uses k-anonymity for maximum privacy.
How Our Password Strength Analyzer Works
Advanced Algorithm Analysis
Uses Dropbox's zxcvbn algorithm to detect patterns, sequences, and common password weaknesses that basic checkers miss.
Breach Database Check
Checks against 613+ million real breached passwords from Have I Been Pwned database using secure k-anonymity.
Complete Security Assessment
Provides entropy calculation, crack time estimation, character analysis, and personalized improvement suggestions.
How to Create Strong Passwords
Use Passphrases
Combine 4+ random words with numbers: CorrectHorseBatteryStaple789
Avoid Common Patterns
Don't use: keyboard patterns (qwerty), sequences (12345), personal info, or common words.
Check Against Breaches
Always verify that your password hasn't appeared in known data breaches.
Frequently Asked Questions
Is it safe to check my password with this tool?
Yes, completely safe. Our password strength analyzer works 100% in your browser. Your password never leaves your computer. We don't store, transmit, or see what you type.
What makes a password strong?
A strong password has:
- Length: At least 12 characters (longer is better)
- Complexity: Mix of uppercase, lowercase, numbers, and symbols
- Unpredictability: No common words, patterns, or personal information
Common Password Problems & Solutions
Weak Password Symptoms
- warning Short length: Less than 12 characters
- warning No variety: All lowercase letters only
- warning Personal info: Contains name, birthdate, pet names
Password Security Checklist
- check_circle Minimum 12 characters long
- check_circle Mix of uppercase, lowercase, numbers, symbols
- check_circle Not found in breach databases
Password Security FAQ
How often should I change my passwords?
Current security recommendations suggest changing passwords only when there's evidence of compromise, not on a fixed schedule. Focus on using unique, strong passwords for each account instead of frequent changes.
Are password managers safe to use?
Yes, reputable password managers like LastPass, 1Password, and Bitwarden are much safer than reusing passwords or writing them down. They use strong encryption and are regularly audited by security experts.
Ready to Check Your Password Security?
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