Password Strength

Checked locally • No data stored

Show

Strength Score

Minimum 8 characters
At least one uppercase letter
At least one lowercase letter
At least one number
At least one special character

Why Use a Password Strength Checker?

In the age of frequent data breaches and credential stuffing attacks, a weak password is a significant liability. Our Password Strength Checker uses real-time entropy analysis to determine how difficult it would be for a computer to guess your credentials.

Is This Tool Private?

Yes. Unlike many online tools, our checker runs entirely in your browser using JavaScript. Your password is never uploaded to a server, never stored in a database, and remains completely private to your local device. This "Zero-Knowledge" approach ensures maximum security.

Best Practices for a Strong Password

Length Matters: Every additional character increases the "entropy" (randomness) exponentially. Aim for 12-16 characters.
Avoid Patterns: Avoid common sequences like "12345" or "qwerty".
Use Passphrases: Instead of a word with symbols, try a long sentence with random words (e.g., Correct-Horse-Battery-Staple).
Enable MFA: Even with a strong password, Multi-Factor Authentication (MFA) provides a critical second layer of defense.