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Password Strength Estimator

Estimate character diversity without checking leaked password databases.

Input

Up to 200 KB

Result

Your result will appear here.

 Processed on your device · Content is not stored.


Instructions & limits
How to use
Estimate character diversity without checking leaked password databases.
  1. Enter your content, or select Use example.
  2. Adjust the available options.
  3. Select Run tool, review the result and copy or download it.
When to use this tool
Estimate character diversity without checking leaked password databases.
Example input
Correct-Horse-42!
Limits
Does not detect common patterns or leaked passwords. Entropy is an upper bound, not a reliable security score. Input up to 200 KB. This only estimates character variety, not actual resistance to guessing.
Frequently asked questions
What does this tool do?
Estimate character diversity without checking leaked password databases.
What are the limits?
Does not detect common patterns or leaked passwords. Entropy is an upper bound, not a reliable security score. Input up to 200 KB.
Is my data sent to a server?
No. This tool runs in your browser. We do not receive your input or result.
Do I need an account?
No. Use the tools for free without signing in. Favorites and recent tools are stored only in your browser.
Does this work on mobile?
Yes, in a modern browser with Web Crypto support. 
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