Generate Secure Password
Crack Time Estimation
Why Strong Passwords Matter
Weak passwords are the leading cause of account breaches. A strong password protects your digital identity, financial assets, and sensitive data from unauthorized access.
Understanding Password Strength
Password strength is measured by:
- Length: Longer passwords exponentially harder to crack
- Complexity: Mix of character types increases difficulty
- Entropy: Randomness measured in bits - higher entropy = stronger
- Predictability: Avoid common words, patterns, and sequences
NIST 800-63B Compliance
Per NIST SP 800-63B guidelines:
- Minimum 8 characters, recommend 64+ for high-security
- No composition rules (mixing character types)
- No periodic password resets required
- Screening against common passwords dictionary
- Password length is more important than complexity
- Allow users to see passwords during entry
Password Entropy Explained
Entropy measures password randomness in bits. Each additional bit doubles the number of possible combinations.
- 28 bits: Very weak - crackable in hours
- 36 bits: Weak - crackable in days
- 60 bits: Strong - crackable in centuries with brute force
- 80+ bits: Very strong - practically uncrackable
Common Password Mistakes
- Using personal information (birthdays, names, pet names)
- Sequential patterns (password123, qwerty)
- Reusing passwords across multiple accounts
- Short passwords under 12 characters
- Dictionary words alone
How This Tool Generates Passwords
This tool uses the Web Crypto API's crypto.getRandomValues() for cryptographically secure random number generation. The entropy source is suitable for security-sensitive applications.
When to Use This Tool
- Creating new account passwords
- Updating expired passwords
- Generating service account credentials
- Creating API keys (use as starting point, add prefix)
- Password manager master password generation