How to Check Password Strength Online
Test how strong your password is with our free password strength checker. Get instant feedback and improvement suggestions.
Steps
Open the Password Generator
Navigate to the Password Generator tool and switch to the Strength Check mode.
Enter a password to test
Type or paste the password you want to evaluate. The tool analyzes it locally in your browser.
Review the strength score
The tool displays a strength rating (weak, fair, strong, very strong) along with estimated crack time and specific feedback on what makes the password weak or strong.
Beyond Length: What Really Matters
While length is the most important factor, a 20-character password of all lowercase letters is weaker than a 12-character password mixing upper, lower, numbers, and symbols. The best passwords combine length with randomness. Avoid dictionary words, keyboard patterns, and personal information.
Frequently Asked Questions
Yes. The strength check runs entirely in your browser. Your password is never transmitted to any server or stored anywhere.
Short length, common dictionary words, predictable patterns (123456, qwerty), personal information, and reuse across multiple sites all contribute to password weakness.
The tool calculates entropy based on the character set and length, then estimates how long it would take to brute-force the password at various attack speeds, from online attacks (throttled) to offline attacks (billions of guesses per second).