Password Intelligence
Password Strength Checker
Analyze passwords locally for entropy, crack time, character distribution, and safer recommendations.
Analyze
We never send your password anywhere. Analysis is done locally in your browser.
Score
Target: 80 / 100 and 12+ characters.
Signals
Strength Factors
Length 25%
Longer passwords give attackers more possible guesses to search through.
Entropy 30%
Entropy estimates how unpredictable the password is. Higher is better.
Character Diversity 20%
Using different character types can widen the possible search space.
Pattern Avoidance 15%
Common patterns, repeats, and keyboard walks are easier to guess.
Uniqueness 10%
A password should be unique to one account so one breach does not unlock others.
Show scoring model
Model
Estimated Time to Crack
- Online Attack –
- Offline Modern Hardware –
- Advanced Attacker –
- Quantum Computer –
Show character distribution
Composition
Character Distribution
- Lowercase 0 (0%)
- Uppercase 0 (0%)
- Numbers 0 (0%)
- Symbols 0 (0%)
Show recommendations
Use Wisely
Strength Recommendations
- Use at least 12 characters.
- Mix lowercase, uppercase, numbers, and symbols.
- Avoid common patterns and keyboard walks.
- Never reuse passwords across critical accounts.
Read Strength Carefully
A strength score is a warning light, not a promise. Use it to spot weak choices before they become real problems.
Length Matters
Short passwords run out of possible combinations quickly. More characters give attackers more ground to cover.
Patterns Hurt
If it feels easy to remember because it follows a pattern, it may be easy for someone else to guess too.
Unique Means Unique
A strong password reused in two places is no longer strong enough. One breach should not unlock another account.
Best Practice
Use this checker to learn, then generate and store real passwords in a password manager.