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パスワード生成

強力なパスワードを作成

ブラウザで動作 · アップロード不要

このツールとページ内の説明は、現在は英語のみです。動作は同じで、すべてブラウザ内で実行されます。

Made with your browser's cryptographic random number generator. Passwords are created on your device, never sent anywhere and not stored: copy one before you leave the page.

  • 何も端末から出ません
  • サーバーによるサイズ制限なし
  • 登録不要・透かしなし
  • 無料

How to make a strong password

  1. A new password appears at once.
  2. Choose the length and which characters to use.
  3. Copy it, and save it in your password manager.

How strong?

  • The strength is shown in bits of randomness: 60 bits is good for most accounts, 80 or more is very strong.
  • Length matters most: 16 characters or more is a good habit.
  • "Avoid look-alikes" leaves out I, l, 1, O and 0, for passwords you have to type or read out.

Made on your device

Passwords come from your browser's cryptographic random number generator (the same one used for encryption), with every character chosen evenly. They are not stored, not logged and never sent anywhere.

よくある質問

Are the passwords saved?

No. They exist only in this page. Copy the one you want before you leave.

Should I reuse a strong password?

No. Use a different password for every account, and a password manager to remember them.