🔒
🔐

Check Password Strength Before Signing Up

Test whether a password is strong enough before creating a new account on any website or app.

ログイン不要

Your password is never sent to any server.

Account Security tips

🔐

A good password for a new account should be at least 12 characters and score "Strong" here. This means an estimated crack time in the billions of years.

💡

Use a passphrase — 4 random words like "coffee-river-lamp-moon" — it's easy to remember, has high entropy, and passes all strength checks.

🚫

Avoid using personal info: names, birthdays, favourite teams. These are guessable through social engineering even if the password looks complex.

🔑

Use a unique password for every account. A password manager generates and stores strong passwords for you so you only remember one master password.

使い方

1
入力
Enter your data into the tool above. Everything stays local to your browser.
2
処理
The tool processes your data instantly in your browser using JavaScript. No server, no waiting.
3
ダウンロード
Get your result instantly. Nothing is stored after you leave the page — complete privacy.

なぜ私たちのツール?

完全に無料 — 隠れたコストは永遠にありません
アカウント、メール、ログイン不要
ファイルがデバイスを離れることはありません
ファイルサイズの制限は一切ありません
出力に透かしなし

Also check out…

よくある質問