Password Strength Checker

Assess password strength with entropy, composition, and pattern checks plus tips to improve security.

Password
Assess password strength with entropy, composition, and pattern checks plus tips to improve security.

Strength checks run locally in your browser.

Strength Summary
Enter a password to check its strength.
Strength Summary
Enter a password to check its strength.

What is Password Strength?

Password strength describes how resistant a password is to guessing and cracking attacks.

  • Longer passphrases increase entropy and are easier to remember.
  • Mixing uppercase, lowercase, numbers, and symbols improves variety.
  • Avoid reused, common, or leaked passwords.

A short password like 123456 or qwerty is often cracked in less than a second. A longer unique passphrase like Blue-Lemon!River-2026 can push estimated crack times to years or longer.

Use a password manager to generate and store unique passwords.