パスワード強度診断

パスワードの複雑さとエントロピーを評価し、最新の攻撃手法で解読されるまでの推定時間を判定。

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Enter a password to test

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Checked entirely in your browser — nothing is sent anywhere or stored.

パスワード強度診断

作成したパスワードが十分な強度を持っているか、安全性を手元でチェックできます。

🔐 100% Private — Client-Side Execution

All processing happens inside your browser using WebAssembly and HTML5 Canvas. Zero file uploads, zero server tracking. Compliant with LGPD & GDPR.

よくある質問 (FAQ)

Is my password sent anywhere to be checked?

No. Every check runs locally in your browser — nothing you type here is ever transmitted or stored.

Why did a long password still score as weak?

Length alone isn't enough — passwords using only lowercase letters, common words, or predictable patterns like "123" score lower even if they're long.

What should I do if my password scores poorly?

Follow the specific unmet checks shown below the meter — usually adding character variety and length, and avoiding common words or sequences, is enough to reach a strong score.

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Score 99+ on Google PageSpeed Insights

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パスワード強度診断

パスワード強度診断

よくある質問 (FAQ)

Score 99+ on Google PageSpeed Insights

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