Password Strength & Entropy Checker

Evaluate cryptographic entropy bits, character pool diversity, dictionary vulnerabilities, and estimated cracking time against GPU clusters.

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100% Zero-Leak Privacy Guarantee: Your password is evaluated purely inside your browser memory. Nothing is logged or transmitted over any network.
Test Sample Passwords:
Strength Level:Unbreakable
Entropy: 139 bits • Pool size: 94 chars
⚠️ Security Warnings & Suggestions:
  • Contains common dictionary or predictable sequence ("2026").

Estimated Cracking Resistance Time

Online Web Attack
Rate-limited login (1,000 guesses / sec)
6.746715126933738e+26 trillion+ years
Fast Offline Hash Attack
Single GPU cracking (100 Billion / sec)
6746715126933738496.0 trillion+ years
Supercomputer Cluster
Distributed GPU array (100 Trillion / sec)
6746715126933739.0 trillion+ years

Character Pool Composition Audit

Length ≥ 12 Chars✓ (25)
Lowercase (a-z)✓
Uppercase (A-Z)✓
Numbers (0-9)✓
Symbols (!@#$%)✓
Spaces / Special✕