🔒 Password Strength Meter

Test Your Password Security

Before using a password for important accounts, it's crucial to know how secure it really is. This password strength meter analyzes your password in real-time, checking length, complexity, patterns, and common weaknesses. Get instant feedback on what makes your password strong or weak, and learn how to improve it.

How Password Strength is Measured

Password strength is determined by multiple factors:

• Length: Longer passwords are exponentially harder to crack. Each additional character multiplies the possible combinations
• Character Variety: Mixing uppercase, lowercase, numbers, and symbols increases complexity
• Randomness: Avoiding dictionary words, patterns, and personal information makes passwords harder to guess
• Uniqueness: Passwords that aren't commonly used are more secure

Password Strength Levels

• Very Weak: Short (under 8 characters), simple patterns, or common passwords. Can be cracked in seconds.
• Weak: 8-10 characters with limited complexity. May take minutes to hours to crack.
• Moderate: 10-12 characters with mixed character types. May take days to weeks to crack.
• Strong: 12-16 characters with full complexity. May take months to years to crack.
• Very Strong: 16+ characters with full complexity and randomness. Practically uncrackable with current technology.

Common Password Weaknesses

• Too Short: Passwords under 12 characters are vulnerable to brute force attacks
• Dictionary Words: Common words are easily cracked by dictionary attacks
• Personal Information: Names, birthdays, addresses can be found online or guessed
• Simple Patterns: "123456", "qwerty", or keyboard patterns are extremely weak
• Repeated Characters: "aaaa" or "1111" reduce password complexity
• Sequential Characters: "abc123" or "98765" are predictable patterns

How to Improve Your Password

Increase Length: The single most important factor. Aim for at least 16 characters for important accounts.

Add Character Types: Include uppercase, lowercase, numbers, and symbols to maximize complexity.

Use Random Combinations: Avoid words, patterns, or personal information. Random character strings are strongest.

Consider Passphrases: Long phrases with spaces and mixed characters can be both strong and memorable (e.g., "Coffee!Moon#Dance$2025").

Use a Password Manager: Let a password manager generate and store strong, unique passwords for each account.

Understanding Crack Time Estimates

This meter estimates how long it would take a computer to crack your password through brute force (trying every possible combination). These estimates assume:

• Modern computing power (billions of attempts per second)
• No additional security measures (like account lockouts)
• Offline attacks (attacker has the password hash)

In reality, most online services have security measures that slow down or prevent brute force attacks. However, if a password database is breached, attackers can try passwords offline at full speed.

Important Security Notes

This password checker runs entirely in your browser - your password is never sent to our servers. However, for maximum security, avoid checking passwords for accounts you're actively using on public or untrusted computers. Always use unique passwords for each account, and consider enabling two-factor authentication for additional security. This tool is for educational purposes to help you understand password security.