Password Strength Checker
Privacy: all password analysis runs locally in your browser, never uploaded to any server.
Password Strength Checker
Check password strength locally in your browser using the zxcvbn algorithm, with entropy, crack time estimates, warnings and suggestions.
Security note: This is a self-assessment tool only. Do not paste real production passwords. Use a password manager for secure password management.
Strength: --
Score: 0 / 4
Entropy
zxcvbn estimate: 0 bits
Theoretical upper bound: 0 bits
Estimated crack times
| Online (10/hour) | -- |
| Online (10/second) | -- |
| Offline slow hash (1000/s) | -- |
Warnings
- No warnings
Suggestions
- No suggestions
Character types
✓ Lowercase letters
✓ Uppercase letters
✓ Digits
✓ Symbols