Password Analyzer
Analyze password strength and generate secure passwords.
Start typing to analyze entropy, crack times, and vulnerability patterns.
Free password strength checker that analyzes your passwords in real-time. Get detailed feedback on security vulnerabilities, crack time estimates, and actionable suggestions to create stronger passwords—all processed locally in your browser.
How to Use This Password Strength Analyzer
- 1Type or paste your password in the input field
- 2View the real-time strength meter and score (0-4)
- 3Read the detailed feedback and suggestions for improvement
- 4Check the estimated crack times for different attack scenarios
- 5Apply suggestions to create a stronger password
Features
- ✓Real-time strength analysis
- ✓0-4 strength score with visual meter
- ✓Crack time estimates for various attack types
- ✓Pattern detection (common words, dates, sequences)
- ✓Actionable improvement suggestions
- ✓100% client-side processing (password never leaves your device)
- ✓Based on zxcvbn algorithm (used by Dropbox)
How Password Strength is Measured
Password strength is determined by entropy—the unpredictability of a password. Strong passwords resist attacks like brute force (trying all combinations), dictionary attacks (common words), and pattern-based attacks (keyboard patterns, dates). This tool uses the zxcvbn algorithm, which models real-world password cracking by detecting common patterns, substitutions (like @ for a), and leaked password databases.