Password Strength Checker
Type or paste a password to see its strength, estimated entropy, and specific tips to make it stronger — nothing leaves your browser.
This runs entirely in your browser — the password is never sent anywhere.
Password Strength Checkerの使い方
- 1
Type or paste a password into the field.
- 2
Review the strength bar, entropy estimate and specific feedback.
- 3
Adjust your password until it reaches a strong rating.
Password Strength Checkerの機能
- Runs entirely in your browser — the password is never sent to a server or logged anywhere.
- Flags passwords found on well-known 'most common passwords' lists.
- Detects repeated and sequential characters, not just length and character variety.
Tool Kingが選ばれる理由
高速
待ち時間や登録は不要。ほとんどのファイルは数秒で完成します。
プライバシー重視
ファイルはメモリ上で処理され、処理後すぐに破棄されます — 保存や共有は一切されません。
無料
すべてのツールが無料で、基本機能に隠れた制限はありません。
よくある質問
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