Password Strength Checker
Test the strength of your passwords
Enter Password to Check
Note: When the time-to-crack estimate shows "Eons", it means the passphrase is so complex that brute-force cracking would take longer than the age of the universe — effectively uncrackable with current technology. This is an approximation for illustrative purposes only, not an absolute guarantee of security.
How It Works
1. Enter Your Password
Type any password into the field. Your password is analyzed entirely in your browser and never sent to our servers.
2. Real-Time Analysis
Our algorithm instantly evaluates length, complexity, character variety, and common patterns to calculate strength.
3. Get Actionable Feedback
Receive specific suggestions to improve your password strength, plus an estimate of how long it would take to crack.
What Makes a Strong Password?
A strong password combines multiple factors to resist various attack methods. Understanding these factors helps you create better passwords.
Length Matters Most
Passwords should be at least 12 characters long. Each additional character exponentially increases cracking time.
Character Variety
Mix uppercase, lowercase, numbers, and symbols to expand the possible character combinations attackers must try.
Avoid Predictability
Don't use dictionary words, personal information, or common patterns like '123456' or 'password123'.
Best Practices
Avoid Common Passwords
Never use passwords from common lists like 'password', '123456', or 'qwerty'. These are cracked instantly.
Unique for Every Account
Use a different password for each account. If one is compromised, your other accounts remain secure.
Change When Necessary
Update passwords immediately if you suspect a breach. Otherwise, strong unique passwords don't need frequent changes.
Frequently Asked Questions
How does the password strength checker work?
Is it safe to check my real password?
What is a good password strength score?
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