Password Strength Checker
Check how strong your password is. Get detailed feedback on length, complexity, and estimated crack time. Free, private, and analyzed entirely on your device.
Loading tool...
How to Check Password Strength
Enter Password
Type or paste your password into the input field.
Review Analysis
See the strength score, estimated crack time, and detailed feedback.
Improve
Follow the suggestions to make your password stronger.
Why Use Our Password Strength Checker?
100% Private
Your password is analyzed locally and never leaves your device.
Detailed Analysis
Get feedback on length, character variety, and common patterns.
Crack Time Estimate
See approximately how long it would take to crack your password.
Completely Free
No limits, no signup. Check as many passwords as you need.
Frequently Asked Questions
Is my password sent anywhere?
No! All analysis happens locally in your browser using JavaScript. Your password is never transmitted, stored, or logged.
How is crack time calculated?
We estimate based on the password's entropy and assume an attacker can try 1 billion guesses per second (typical for modern hardware).
What makes a password strong?
A strong password is long (16+ characters), uses a mix of uppercase, lowercase, numbers, and symbols, and avoids common words or patterns.
Should I test my real passwords?
While the tool is completely private, it is good practice to test similar but not identical passwords. Never share your real passwords.
What is password entropy?
Entropy measures randomness. Higher entropy means more possible combinations, making the password harder to guess or crack.