Password Strength Checker

Estimate entropy and generate secure passwords (client-side only)

This tool runs entirely in your browser. No password data is sent to any server. Use the generator for strong, random passwords and the checker to understand strength and improvement suggestions.

Entropy: 0.0 bits — Very Weak
Suggestions
  • Use at least 12 characters.
  • Add lowercase letters.
  • Add uppercase letters.
  • Add digits (0-9).
  • Add symbols (e.g., !@#$%).
16
All generation happens in your browser — nothing is sent to a server.