Password Strength Analyzer
Analyze password strength with crack time estimates, pattern detection, and security tips
Embed This Tool
Add this tool to your website with customizable styling
How to Use
- 1 Enter your password — Type or paste the password you want to analyze.
- 2 View strength analysis — See the visual strength meter, entropy, and crack time estimates.
- 3 Review detected patterns — Check for weaknesses like dictionary words or keyboard patterns.
- 4 Read suggestions — Follow the recommendations to improve your password security.
- 5 Use advanced features — Compare passwords or check against custom policy requirements.
Frequently Asked Questions
How is password strength calculated?
We use zxcvbn, Dropbox's open-source password strength estimator. It analyzes patterns, dictionary words, and estimates crack time based on various attack scenarios.
Is my password sent to a server?
No, absolutely not. All analysis happens locally in your browser using JavaScript. Your password never leaves your device.
What is password entropy?
Entropy measures password randomness in bits. Higher entropy means more possible combinations, making the password exponentially harder to guess.
What makes a strong password?
Strong passwords are long (12+ characters), mix character types (upper, lower, numbers, symbols), avoid dictionary words and common patterns, and are unique for each account.