Password Strength Checker

Check how strong your password is. Get entropy bits, estimated crack time, a 0-100 score, and specific suggestions to improve it. Everything runs locally — your password is never sent anywhere.

Password Strength & Entropy Checker

Strength: None 0 / 100
0 bits
Entropy
Instant
Offline Crack Time
Instant
Online Crack Time
0
Character Pool

Security Criteria Checklist

  • ⚪ At least 12 characters long
  • ⚪ Contains uppercase letters (A-Z)
  • ⚪ Contains lowercase letters (a-z)
  • ⚪ Contains numbers (0-9)
  • ⚪ Contains symbols (!@#$%...)
  • ⚪ No obvious sequential patterns (1234, abcd)
🔒 Airtight Privacy: Your password is evaluated exclusively in memory using client-side JavaScript. It is NEVER transmitted across any network or saved.