Password Strength Checker
Check password strength with entropy scoring and tips to make it more secure.
- ⚠️ Use at least 8 characters
- ⚠️ Consider using 12+ characters for better security
- ⚠️ Add lowercase letters (a-z)
- ⚠️ Add uppercase letters (A-Z)
- ⚠️ Add numbers (0-9)
- ⚠️ Add special characters (!@#$%^&*)
A password that satisfies every common composition rule, one uppercase letter, one number, one symbol, can still be genuinely weak if it follows a predictable pattern like capitalizing the first letter and tacking a "1!" onto the end, exactly the kind of password composition rules encourage without actually measuring how unpredictable the result really is. Entropy measures that unpredictability directly, in bits, rather than checking off a checklist of character types, which is a meaningfully different and more honest way to score a password's actual strength.
See moreSee less about the Password Strength Checker
This tool checks a password's entropy and returns specific, practical suggestions for genuinely improving it, rather than just a pass or fail against composition rules. Useful for understanding why a password that technically meets every complexity rule might still be weak, or getting concrete suggestions for strengthening a password beyond just adding another required character type.
Key features
- Clean interface
- Fast processing
- No signup required
- Works offline