Password Strength
Use the Password Strength to track training progress. Enter your lifts, reps, or body stats to get personalised targets and performance benchmarks.
Formula
Score based on length, entropy, and pattern matching
We analyze character set size and length to calculate entropy. We also deduct points for known weaknesses like dictionary words, repeated characters, and common sequences.
Worked Examples
Example 1: Weak Password
Problem:Analysis of 'Password123'
Solution:Score: 10/100 Crack Time: Instant Issues: - Common word - Predictable pattern - Too short Verdict: Extremely vulnerable to dictionary attacks.
Result:Do not use!
Example 2: Moderate Password
Problem:Analysis of 'MyDogRex1990'
Solution:Score: 45/100 Crack Time: 2 days Issues: - Uses dictionary words - Uses personal info (year) - No symbols Verdict: Better than 'Password123' but still guessable.
Result:Okay for low-risk sites
Example 3: Strong Password
Problem:Analysis of 'K7$mP9#vL2@qX5'
Solution:Score: 100/100 Crack Time: Billions of years Features: - 14 characters - Random mix of all types - No patterns Verdict: Excellent for banking or primary email.
Result:Highly Secure
Frequently Asked Questions
What makes a strong password?
A strong password is at least 12 characters long (16+ is better) and includes a mix of uppercase letters, lowercase letters, numbers, and special symbols. It should not contain personal information, dictionary words, or predictable patterns.
Why is length more important than complexity?
Each additional character exponentially increases the number of possible combinations. A 15-character password of just lowercase letters is often stronger than an 8-character password with complex symbols because the search space is vastly larger.
Should I use a password manager?
Yes! Password managers allow you to use unique, complex, random passwords for every single account without needing to memorize them. You only need to remember one strong master password.
Is my password safe on this tool?
Yes. Password Strength runs entirely in your browser. Your password is never sent to any server, stored, or shared. You can even disconnect from the internet while using it to be sure.
What is entropy in passwords?
Entropy measures the unpredictability or randomness of a password in bits. Higher entropy means it's harder for an attacker to guess. A random string has high entropy; a dictionary word has low entropy.
How often should I change my password?
Modern advice is to only change passwords if you suspect a breach. Forced regular changes often lead to users choosing weaker, predictable passwords (e.g., changing 'Pass1' to 'Pass2').
What is Two-Factor Authentication (2FA)?
2FA adds a second layer of security (like a code sent to your phone) beyond just your password. Even if a hacker guesses your strong password, they cannot access your account without the second factor.
How long should a strong password be?
A strong password should be at least 12-16 characters long. Each additional character exponentially increases the time needed to crack it. A 12-character password with mixed character types would take centuries to brute-force with current hardware.
Are random passwords really more secure?
Yes. Randomly generated passwords avoid patterns, dictionary words, and personal information that attackers exploit. Human-chosen passwords tend to follow predictable patterns like capitalizing the first letter and adding a number at the end.
How often should I change my passwords?
Current security guidance from NIST recommends changing passwords only when there is evidence of a breach, not on a fixed schedule. Forced frequent changes lead to weaker passwords. Focus on using unique, strong passwords with two-factor authentication instead.