Password Strength Checker - Test Your Password Security
Analyze password strength, entropy, estimated crack time, and receive security improvement suggestions
Calculators
Calculator
How to Use
1Type or paste your password into the input field
2The checker analyzes length, uppercase letters, lowercase letters, digits, and special characters in real time
3Review the strength rating, entropy score, estimated crack time, and suggestions for improvement
Frequently Asked Questions
A strong password is at least 12 characters long and combines uppercase letters, lowercase letters, numbers, and special characters. Avoid dictionary words, names, and predictable patterns.
Entropy measures how unpredictable a password is in bits. The higher the entropy, the harder it is to crack. A password with 60+ bits of entropy is generally considered strong.
No. The password strength check is performed entirely in your browser. Your password is never sent to any server.
The crack time is estimated based on the password's entropy and an assumed attack rate of 10 billion guesses per second, which is a realistic speed for a modern GPU-based brute-force attack.