Password Strength Checker

The Password Strength Checker is a free online tool that evaluates how strong or weak any given password is and estimates how long it would take for a modern computer to crack it using brute-force or dictionary attack methods. Understanding password strength helps you make smarter security decisions.

Not all passwords that look complex are actually strong. This tool analyzes character variety, length, predictable patterns and common password lists to give you an accurate strength score — not just a basic visual meter.

How to Check Password Strength

• Type or paste a password into the input field (it is never stored or transmitted)
• View the strength rating: Weak, Fair, Strong or Very Strong
• See the estimated crack time and specific suggestions for improvement

What Makes a Password Strong

• Length — each additional character exponentially increases crack time
• Character variety — mix of uppercase, lowercase, numbers and symbols
• Unpredictability — no dictionary words, names or keyboard patterns
• Uniqueness — not similar to commonly used passwords (123456, password, etc.)

This tool also checks your password against the Have I Been Pwned breach database using privacy-preserving k-anonymity (only a partial hash prefix is ever sent — your real password never leaves your browser), so you'll know immediately if it has appeared in a known data leak. If your password scores Weak or Fair, use our Password Generator to create a stronger one. Free, no login needed.