Security · free tool

Password strength checker

Check password strength (entropy, crack time).

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Runs in your browser⌑ Your data stays on your device

About this tool

Check password strength (entropy, crack time). Useful for security. Processing is local (password not sent).

When to use it

  • Security.
  • Passwords.
  • Accounts.
Example

'P@ssw0rd123' → medium (crack: 3 hours).

How to use

  1. Enter password.
  2. Click "Check".
  3. Read the rating.
What is entropy?

Measure of randomness (bits).

Is password sent?

No, processing is local.

Is data uploaded?

No, processing is local.