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乱数&ランダム文字列ジェネレーター

Numbers, strings, UUIDs — secure randomness from the browser.

Runs in your browser

Output

    編集者注

    Understanding · Math.random isn't always random enough.

    この詳細な解説章は現在、英語版のみで提供されています。上の変換ツールはあなたの言語で動作しますが、長文の解説記事はまだ翻訳されていません。

    よくある質問

    Quick answers.

    How secure are these random values?

    The generator uses `crypto.getRandomValues()`, which is a cryptographically strong source of entropy provided by your browser. This makes the output suitable for use-cases requiring high unpredictability, such as tokens or temporary secrets.

    What is a UUID?

    A Universally Unique Identifier (UUID) is a 128-bit label used for identification in software systems. We generate Version 4 UUIDs, which are constructed entirely from random numbers.

    Can I generate multiple values at once?

    Yes. You can specify the 'Count' field to generate a list of numbers or strings in a single batch for bulk processing.

    Is my data logged?

    No. Because the generation occurs within your browser's memory, no record of the generated strings or numbers exists on our servers.

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