セキュリティ

パスワード強度チェッカー

パスワードがどれだけ強いかテストし、改善のヒントを得る

Password Strength Checker

Check how strong your password is and get specific suggestions to improve it. Checks length, character variety, common patterns, dictionary words, and estimates crack time.

FAQ

What makes a password strong?

Length (16+ characters), randomness (no dictionary words), and variety (mix of uppercase, lowercase, digits, symbols).

What is a dictionary attack?

A dictionary attack tries common words, phrases, and their variations. A password like 'Password123!' fails because it follows a predictable pattern.

How long would it take to crack my password?

A 8-character random password can be brute-forced in hours. A 16-character random password would take billions of years with current hardware.

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