パスワード強度チェッカー

このツールの使い方

1. 1

   Type or paste a password into the input field.

2. 2

   Read the rating (Very weak to Excellent) and the estimated entropy in bits shown below the field.

3. 3

   Follow the specific suggestions, such as adding uppercase letters, numbers, or symbols, or increasing the length.

4. 4

   Clear the field when you are done so the password does not stay on screen.

パスワード強度チェッカーとは何ですか？

よくある活用例

• Quickly sanity-checking a password you just made up before using it on a new account.

• Showing a teammate or family member why length and a symbol matter more than they expect.

• Demonstrating in a security training session how entropy grows as you add character classes.

• Confirming a password is not literally one of the ten most common passwords before saving it.

• Comparing two candidate passphrases to see which character mix yields more estimated bits.

• Teaching students the brute-force entropy formula by watching the bit count change as they type.

よくある質問