ToolPatch

One page. One job. Done.

← Back to all tools
Developer Tools

Password Strength Checker

Evaluate password strength with score, entropy estimate, and improvement tips.

Password Strength Checker evaluates a password and returns a score, entropy estimate, and improvement guidance. It helps you identify weak patterns such as short length, missing character variety, and predictable composition. Use this before enforcing policy changes or when coaching users toward stronger credentials. The tool is intended for local evaluation and iteration so you can quickly improve a candidate password before deployment.

Password Strength Input

Result

Score: 0/100

Rating: Very Weak

Estimated entropy: 0.00 bits

Length: 0

Character classes: lower=no, upper=no, digits=no, symbols=no

Suggestions:

  • Use at least 14 characters.
  • Add uppercase letters.
  • Add lowercase letters.
  • Add numbers.
  • Add symbols.

How to use this tool

  1. Enter the candidate password exactly as it will be used.
  2. Run the checker and review score, entropy estimate, and warnings.
  3. Adjust length/complexity and rerun until the target strength threshold is reached.

Security and credential tools

Promote password managers, MFA apps, and enterprise identity security products.

Affiliate slot placeholder: set ADSENSE_CLIENT_ID and ADSENSE_SLOT_ID to render Google Ads here.