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Password Strength Checker

Analyze password strength and security with comprehensive checks for common vulnerabilities, patterns, and entropy calculation. Get detailed improvement suggestions.

Your password is analyzed locally and never sent to any server

Test Examples

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Security Tips
• Length matters more than complexity
• Use unique passwords for each account
• Consider using a password manager
• Enable 2FA wherever possible

Output

Output will appear here

How It Works

Input Your Data

Paste, type, or upload your data directly into the password strength checker. All processing happens locally in your browser for complete privacy and security.

Configure Options

Customize the tool settings to match your specific needs. Real-time processing with instant validation and error detection.

Process Instantly

Click the process button or enable auto-processing for real-time results. Lightning-fast performance with immediate feedback and validation.

Export Results

Copy results to clipboard, download as files, or share with others. Multiple export formats available for maximum compatibility.

Frequently Asked Questions

How is password strength calculated?
Strength is based on length, character diversity, entropy, absence of common patterns, and dictionary word detection. Scores range from 0-100 considering multiple security factors.
What makes a password strong?
Strong passwords are long (12+ characters), use mixed case, numbers, and symbols, avoid predictable patterns, and don't contain dictionary words or personal information.
How accurate are crack time estimates?
Estimates assume brute force attacks and vary based on available computing power. Real attacks may use dictionaries and patterns, potentially reducing actual crack times.
Should I use special characters?
Yes, symbols significantly increase password entropy and strength. However, length is generally more important than complexity for security.
Are passphrases better than complex passwords?
Long passphrases (4+ random words) are often stronger and more memorable than shorter complex passwords. Both length and unpredictability are crucial.

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