Password Strength Checker - Test Your Password

🔑 Enter Your Password

Enter a password Score: 0/100

⏱️ Estimated Time to Crack

✅ Password Requirements

○ At least 8 characters

○ Uppercase letter (A-Z)

○ Lowercase letter (a-z)

○ Number (0-9)

○ Special character (!@#$%)

○ 12+ characters (recommended)

Characters

Entropy Bits

Character Types

Unique Chars

🎲 Password Generator

Password Length 16

Uppercase (A-Z)

Lowercase (a-z)

Numbers (0-9)

Symbols (!@#$%)

💡 Password Security Tips

📏 Length matters most. A 16-character password is exponentially stronger than an 8-character one. Aim for at least 12-16 characters.

🔤 Mix character types. Combine uppercase, lowercase, numbers, and special characters for maximum entropy.

🚫 Avoid common patterns. Don't use dictionary words, names, birthdays, or keyboard patterns like "qwerty" or "123456".

🔄 Use unique passwords. Never reuse passwords across different accounts. One breach could compromise all your accounts.

🗝️ Consider a password manager. Tools like Bitwarden, 1Password, or LastPass can generate and securely store unique passwords for every account.

❓ Frequently Asked Questions

No! All password checking is done locally in your browser using JavaScript. Your password never leaves your device and is never transmitted over the internet.

Password strength is calculated based on multiple factors: length, character variety (uppercase, lowercase, numbers, symbols), entropy, uniqueness of characters, and absence of common patterns or dictionary words.

Entropy is a measure of randomness or unpredictability in your password, measured in bits. Higher entropy means more possible combinations and a stronger password. 128+ bits of entropy is considered very strong.

The estimate assumes a brute-force attack with modern hardware. Real-world attacks often use smarter methods like dictionary attacks or rainbow tables. The estimate is a general guideline, not an exact measurement.

A very strong password typically has 16+ characters, uses all character types (uppercase, lowercase, numbers, symbols), avoids dictionary words and patterns, and has high entropy (100+ bits).