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Password Strength Checker

Analyze password entropy, common patterns, dictionary hits, and estimate real-world crack time. Everything stays in your browser — nothing is uploaded.

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Strong
Good password strength
79/100
12
Length
95
Character pool
79 bits
Entropy
79/100
Score
Crack-time estimates
Online attack (1k/sec)9583.7 million centurys
Offline hash crack (10B/sec)958.4 centurys

Estimates assume uniform random guessing. Patterns reduce real crack time dramatically.

Composition
Lowercase
Uppercase
Digits
Symbols
Strengths (5)
  • Good length (12+ chars)
  • Contains lowercase
  • Contains uppercase
  • Contains digits
  • Contains symbols

Tips for stronger passwords

  • Aim for 12+ characters with mixed character classes.
  • Avoid names, birthdays, sports teams, and keyboard walks.
  • Use a unique password per site, ideally from a password manager.
  • Whenever offered, enable two-factor authentication.

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