Random String Generator | Letters(A-a), Numbers, Symbols, Hiragana & Katakana
A free, no-registration random string generator. Easily create strong passwords or generate custom strings including Hiragana, Katakana, and symbols with a single click. It's also perfect for TRPG character naming or generating dummy data for testing. All generation is done locally in your browser, ensuring complete security and privacy!
Character Types
How to Use
Choose a Length
Set the output length in the range of 1 to 2048 characters.
Pick Characters
Simple mode controls whole categories, while Detailed mode controls characters individually. Hiragana and Katakana are selectable in a 10x5 gojuon grid.
Generate and Copy
Click "Generate", then use "Copy" to put it on your clipboard. Generate again if you want alternatives.
かな・カナ・英字・数字・記号を自由に組み合わせ可能
チェックボックスのオン・オフだけで、必要な文字種を瞬時に指定。さらに「詳細モード」を使えば、似た文字（Iと1など）を除外したり、逆に特定の文字だけを使って文字列を作るなど、無数のパターンの文字列を生成できます。
スマホ・PCどちらでもインストール不要ですぐに使える
ブラウザを開くだけで、専用アプリのインストールや面倒な会員登録は一切不要。PCでの業務中はもちろん、スマートフォンから外出先で急にテストデータが必要になった時でも、ワンタップでセキュアな乱数を生成できます。
合言葉や秘密の質問に使えるランダムなひらがな文字列づくり
英数字だけでなく「ひらがな」や「カタカナ」を使ったランダム生成にも対応。覚えやすく温かみのある文字列から、TRPGのキャラクター名、イベント用の合い言葉、秘密の質問のダミー回答など、クリエイティブな用途に幅広く活躍します。
FAQ
Is the generated string stored anywhere?
No. Generation runs in your browser, and the string is not uploaded or stored on a server.
Can I use this to generate passwords?
Yes, you can. You can generate a secure password by making the string length as long as the service allows and selecting multiple character types.
Can I include Hiragana/Katakana?
Yes. Enable them to mix Japanese characters. Turn them off if your destination only accepts ASCII.
What is the maximum length I can generate?
Up to 2048 characters. Some services may reject very long strings, so adjust based on your use case.
Is it truly random?
It uses the browser’s `crypto.getRandomValues()` to generate randomness.
Why do symbols change in width conversion?
Unicode compatibility mappings can replace symbols with equivalent code points. If you’re pasting into another system, validate with sample text first.
Is random string strength sufficient?
It depends. Great for test data and placeholder IDs, but for auth tokens/passwords you should choose length/charset/generation method based on your security requirements.
Does character count include line breaks?
Typically yes. Counting rules vary by platform, so check both character count and byte count when needed.
References
- Unicode Standard
Normative source for character systems and code points.
- Unicode UAX #15 (Normalization)
Official normalization behavior reference.
- WHATWG Encoding Standard
Standard for text encoding behavior in browsers.
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