生成工具
密码强度检查器
免费的密码强度检查器。在本地评估熵和强度 — 绝不通过网络发送 — 并提供可操作的提示以改进您的密码。
Runs in your browser
Input
Tested on your device. Nothing is sent or saved.
Need a strong one? Generate a new password
Output
StrengthEmpty
0 characters0 bits
Type a password above to see what it has and what it's missing.
编辑注
Understanding · Entropy beats cleverness.
本深度章节目前仅有英文版本。上方的转换工具支持您的语言;长篇说明文章尚未翻译。
常见问题
Quick answers.
›Is my password sent anywhere?
No — strength estimation runs entirely in your browser. Nothing is logged.
›What does entropy mean?
Bits of randomness — roughly, how many guesses an attacker would need. 50 bits is okay; 80+ is strong; 128+ is excellent.
›Why does 'P@ssw0rd!' get a low score?
Common substitutions (a→@, o→0) are the first thing password crackers try. The pattern 'capital + word + symbol + digit' adds very little real strength.
›Is a long passphrase better than a short complex one?
Usually yes. 'correct horse battery staple' is much stronger than 'P@ssw0rd!' — length wins over complexity.
›Is the checker free?
Yes — fully free, no signup.
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