Password Strength Checker

Analyze your password's security and get tips on how to improve it.

Strength: Empty

What makes a Password Strong?

A strong password is one that is difficult for a human to guess and even harder for a computer program to crack. Password security is often measured in "entropy" – a measure of randomness.

Entropy and Time-to-Crack

Computer programs can try millions of password combinations per second using techniques called "Brute Force" or "Dictionary Attacks".

  • Length: Each additional character exponentially increases the time needed to crack the password.
  • Complexity: Using digits and symbols increases the "charset" size, further increasing the difficulty.
  • Unpredictability: Avoiding names, birthdays, and common words (like "password123") prevents dictionary attacks.

Note: We do not store or transmit your password. All processing is done locally in your browser.