Password Strength Analyser
Discover the strength of your password with this client-side-only password strength analyser and crack time estimation tool
Password Strength Analyzer
Check how secure your password really is
Your password is analyzed locally and never sent to any server.
Enter a password to analyze
We'll check its strength and give you detailed feedback
About Password Security
Password security is a critical aspect of online safety. A strong password is your first line of defense against unauthorized access to your accounts and sensitive information.
Key characteristics of strong passwords:
- Length: Longer passwords are generally more secure (12+ characters recommended)
- Complexity: A mix of uppercase, lowercase, numbers, and special characters
- Unpredictability: Avoid common patterns, dictionary words, and personal information
- Uniqueness: Using different passwords for different services
Common Password Vulnerabilities:
- Dictionary words and common substitutions (e.g., "p@ssw0rd")
- Sequential patterns (e.g., "12345" or "qwerty")
- Personal information (names, dates, etc.)
- Repeating characters or patterns
- Previously breached passwords
This tool uses zxcvbn, a password strength estimator developed by Dropbox. It analyzes passwords based on pattern matching and frequency lists to provide realistic estimates of password crackability.