密码强度检测
分析你的密码安全性 — 100%客户端运行
This tool evaluates your password using multiple criteria: character diversity, length, entropy calculation, common pattern detection (keyboard sequences like "qwerty", repeated characters, sequential numbers), and dictionary word matching. The entropy score measures the theoretical randomness in bits — higher is better. Crack time estimates assume a powerful attacker performing 10 billion guesses per second, which represents a realistic modern GPU-based attack. For maximum security, use a password manager to generate and store unique passwords for every account.
常见问题
我的密码会被发送到任何服务器吗？
No. All password analysis is performed entirely in your browser using JavaScript. Your password never leaves your device — no network requests are made with your password data. You can verify this by disconnecting from the internet and using the tool offline.
What makes a strong password?
A strong password is at least 12 characters long, uses a mix of uppercase and lowercase letters, numbers, and special characters, avoids dictionary words and common patterns (like qwerty or 123456), and is unique for each account. Passphrases — multiple random words strung together — are both strong and memorable.
What is password entropy?
Entropy measures password randomness in bits. Higher entropy means more possible combinations an attacker must try. A password with 40 bits of entropy has about 1 trillion combinations, while 80 bits has about 1.2 septillion. Aim for at least 60 bits of entropy for important accounts.
How is crack time estimated?
Crack time estimates assume an attacker using a modern GPU capable of billions of guesses per second. The estimate is based on the password entropy (number of possible combinations) divided by the assumed attack speed. Real-world times vary based on the hashing algorithm used and the attacker's resources.