Check how strong your password is instantly — see entropy, character variety, and get suggestions to make it more secure. All analysis stays local in your browser.
How to Use Password Strength Checker
- 1Type or paste a password into the input box
- 2The strength meter evaluates it instantly with a rating (weak, fair, strong, very strong)
- 3View detailed feedback: length, character variety, and entropy score
- 4Get actionable suggestions to improve your password
- 5Use the Password Generator to create a strong replacement
Features
- Real-time password strength evaluation as you type
- Entropy-based scoring with character variety analysis (uppercase, lowercase, numbers, symbols, length)
- Actionable improvement suggestions for weak passwords
- All analysis is browser-local — your password is never transmitted or stored
Frequently Asked Questions
What makes a password strong?
Length is the most important factor — 16+ characters is recommended. Mix uppercase, lowercase, numbers, and symbols. Avoid dictionary words, personal info, and common patterns.
Is my password sent anywhere for checking?
No. All strength analysis happens locally in your browser. Your password never leaves your device.
How does the entropy score work?
Entropy measures how unpredictable your password is, based on length and character set size. Higher entropy means stronger protection against brute-force attacks.