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Authorized use only. Use this tool solely on systems, tokens, and assets you own or are explicitly permitted to test — credential extraction, signature forging, and unauthorized access are prohibited by our Acceptable Use Policy.

Password Strength Analyzer

Analyze Password

Strength: Very Strong6/6 checks passed
Entropy
85 bits
Estimated Crack Time
Millions of years+
✓12+ characters
✓Uppercase
✓Lowercase
✓Numbers
✓Symbols
✓Not common

About the Password Strength Analyser

Password strength is measured by entropy — how many guesses an attacker would need. Length matters more than complexity: a 20-character passphrase is stronger than an 8-character password with symbols.

Type a password to see its entropy in bits, estimated crack time, and specific improvement suggestions. The analyzer checks length, character variety, common patterns, and dictionary words. All analysis happens locally — your password never leaves the browser.

How to use

  1. Type or paste a password to analyze.
  2. Review the entropy score and crack time estimate.
  3. Read the specific improvement suggestions.
  4. Adjust and re-analyze until the score is satisfactory.

Frequently Asked Questions

Is my password sent to a server? ▾

No. All analysis happens in your browser using JavaScript. Your password never leaves your device.

What entropy is considered strong? ▾

Below 40 bits is weak, 40-60 bits is moderate, 60-80 bits is strong, and above 80 bits is very strong. A random 12-character password with mixed case, numbers, and symbols is approximately 75 bits.