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乱数生成

ランダムな数を選ぶ

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。

What to pick
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Picked with your browser's cryptographic random generator, so every result is equally likely.

  • 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 pick a random number

  1. Set the lowest and highest numbers, and how many you want.
  2. Choose whether repeats are allowed, and the order.
  3. Press Pick again for a new result, or copy the numbers.

Fair results

Every number comes from your browser's cryptographic random generator, and is picked without bias, so every value in the range is exactly as likely as any other. "No repeats" works like drawing numbered balls from a bag.

Pick from a list

Switch to "From a list", paste names or options (one per line) and pick one or more. Useful for raffles, deciding who goes first, or splitting tasks.

よくある質問

Can I use this for an official lottery or a legal draw?

The randomness is strong, but a draw that has to be checked by others needs a process they can verify; a web page can't prove how it was used.

Is anything sent anywhere?

No. The calculation happens in your browser as you type; nothing is sent anywhere.