Password Strength Checker
Check your password strength.
Learn more
How does the password strength checker work?
Utilo's password strength checker uses modern heuristics that evaluate multiple factors to determine password security. The score ranges from 0 to 100 and considers length, character variety, diversity and common patterns that should be avoided. Everything is processed locally in your browser, ensuring your password is never sent to the server.
Evaluated factors
- Length: Longer passwords receive higher scores (up to 40 points).
- Variety: Presence of lowercase letters, uppercase letters, numbers and symbols.
- Diversity: Number of unique characters in the password.
- Common patterns: Penalizes predictable sequences like "1234", "password", "qwerty", etc.
How to use
- Type or paste the password you want to check in the input field.
- See the score and rating in real-time (Weak, Medium, Strong or Very Strong).
- Read personalized suggestions to improve password security.
- Use the "Generate Strong Password" button if you want to automatically create a new secure password.
Frequently asked questions
Is the password sent to the server during verification?
No. All analysis is done locally in your browser — no data is sent to the server, ensuring complete privacy.
How is the password score calculated?
The score (0-100) considers length, character variety (uppercase, lowercase, numbers, symbols), diversity of unique characters and penalizes common patterns like numeric sequences or dictionary words.
Can I generate a strong password directly in the tool?
Yes. Use the "Generate Strong Password" button to automatically create a 16-character password with letters, numbers and symbols, using cryptographically secure generation.