ジェネレーター・計算機

QRコード、パスワード、テストデータ生成と計算。

Generate QR codes, strong passwords, placeholder text, fake test data, color palettes, and CSS gradients. Calculate percentages, date differences, ages, and convert between units and time zones — all free, instant, and browser-based.

ジェネレーター・計算機 — Frequently Asked Questions

Are generated passwords secure?

Yes. Passwords are generated using your browser's cryptographic random number generator (crypto.getRandomValues), which is cryptographically secure.

Can I download generated QR codes?

Yes. QR codes can be downloaded as PNG images in various sizes.

Do the calculators store my data?

No. All calculations happen locally in your browser. Nothing is stored or transmitted.

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