비밀번호 강도 분석기

(문서는 영어)

What it does

Estimates password strength using zxcvbn - Dropbox’s realistic estimator that models dictionary words, common substitutions, repeats, sequences, and keyboard patterns. Reports a 0-4 score, estimated guesses, crack times, and actionable feedback.

How to use it

1. Type or paste a password.
2. Optionally list related values (username, site, birth year) so they count against strength.
3. Read the score, crack-time estimates, and suggestions.

Examples

• password → Very weak (0) - top-100 common.
• correct horse battery staple → Strong (4) - long, uncommon words.

Good to know

• Private: analysis is local - the password is never sent anywhere.
• zxcvbn is far more realistic than naive

  entropyentropyThe unpredictability of a secret, measured in bits. Each added bit doubles the guesses an attacker needs; strength comes from length and randomness, not from obscurity.

  (length × charset); it knows Tr0ub4dour&3 is weak.
• Related tools: Password Generator, Token Generator.