What should I do if my password is compromised?

If you suspect a password breach: 1) Immediately change it on all sites using that password; 2) Use this tool to verify new password strength; 3) Enable two-factor authentication (2FA); 4) Use a password manager; 5) Check haveibeenpwned.com for known breaches.

Which matters more: length or complexity?

Both matter, but length is typically more critical. A 16-character lowercase-only password (26^16 ≈ 4.36×10^22 combinations) is about 6.6 million times more secure than a complex 8-character password (95^8 ≈ 6.6×10^15). We recommend at least 12 characters with multiple character types.

Password Strength Checker - Free Online Password Security Test

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0/100 points

🔢 At least 8 characters

🔠 Contains uppercase

🔡 Contains lowercase

🔢 Contains digit

🔣 Contains special char

📏 At least 12 characters

🛡️ Not a common password

🔤 No sequences/repeats

🔬 Password Entropy Estimation

Enter a password to see results

📖 Frequently Asked Questions

How does the password strength checker work?

The checker evaluates passwords across multiple dimensions: length, character diversity, common password detection, keyboard sequences, and repeating patterns. Each dimension contributes to a 0-100 strength score.

Is it safe to test my password here?

Absolutely! All password checking happens locally in your browser. Your password never leaves your device, is never uploaded, and is never stored. You can even use this tool offline.

What makes a strong password?

A strong password: at least 12 characters, includes uppercase, lowercase, digits and symbols, no common words or keyboard sequences, and unique per account.

What if my password was leaked?

If compromised: 1) Change it immediately; 2) Enable 2FA; 3) Use a password manager; 4) Check haveibeenpwned.com.

Length vs complexity: which matters more?

Both matter, but length is more critical. A 16-char lowercase password is ~6.6 million times more secure than a complex 8-char one. Aim for 12+ chars with mixed types.

🔐 Password Strength Checker