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🎲 随机 UTF-8 文本Generate Random UTF-8
在码位范围内生成随机 UTF-8 文本（可设种子）。本地处理。可设置「数量」、「起始」、「结束」、「种子」。Generate random UTF-8 text in a code-point range (optional seed). Processed locally. Settings: Count, From, To, Seed.
使用说明与常见问题How-to & FAQ
「随机 UTF-8 文本」是什么？What is the Generate Random UTF-8 tool?
在码位范围内生成随机 UTF-8 文本（可设种子）。本地处理。可设置「数量」、「起始」、「结束」、「种子」。Generate random UTF-8 text in a code-point range (optional seed). Processed locally. Settings: Count, From, To, Seed.
如何使用「随机 UTF-8 文本」？How do I use the Generate Random UTF-8 tool?
在「随机 UTF-8 文本」中，把内容粘贴或输入到上方输入框，按需设置「数量」、「起始」、「结束」、「种子」，结果会实时显示在下方，点击「复制结果」即可复制。In the Generate Random UTF-8: Paste or type into the input box, adjust "Count", "From", "To", "Seed"; the result appears below instantly — click "Copy result" to copy it.
这个工具有什么用？What is it for?
用来测试编码、生成占位文字或做模糊测试输入。起止码位可以写 U+41、0x41 或十六进制 41。Handy for encoding tests, placeholder text or fuzzing input. From and To can be written as U+41, 0x41 or hex 41.
范围包含代理码位怎么办？What about surrogate code points in the range?
U+D800–U+DFFF 是 UTF-16 代理码位，不是字符，不能编码成 UTF-8，所以会被跳过：其余码位等概率抽取，不会反复重试。范围里只有代理码位时（如 U+D800 到 U+DFFF）会提示没有可用的字符。U+D800–U+DFFF are UTF-16 surrogates, not characters, and cannot be encoded in UTF-8, so they are skipped: the remaining code points are drawn with equal probability and nothing is retried. A range that contains only surrogates (such as U+D800 to U+DFFF) shows an error saying there are no valid characters.
输入和输出是什么样的？What does the input and output look like?
例如在「随机 UTF-8 文本」中输入 x，「数量」设为 4，「起始」设为 U+41，「结束」设为 U+41，「种子」设为 1，输出为：AAAA。For example, the Generate Random UTF-8 turns the input x, "Count" set to 4, "From" set to U+41, "To" set to U+41, "Seed" set to 1 into: AAAA.
有哪些选项可以调整？What options can I adjust?
「随机 UTF-8 文本」的设置：「数量」默认 8；「起始」默认 U+41；「结束」默认 U+7A；「种子」默认 1。每次生成结果都按当前设置处理。Settings in the Generate Random UTF-8 — "Count" default 8; "From" default U+41; "To" default U+7A; "Seed" default 1. The result always uses the current settings.
编码和加密有什么区别？Is encoding the same as encryption?
编码（如 Base64、URL 编码）可直接还原，不提供保密性；加密需要密钥。「随机 UTF-8 文本」的处理全部在本地完成。No. Encoding (Base64, URL…) is reversible by anyone; encryption needs a key. The Generate Random UTF-8 works fully offline in your browser.
「随机 UTF-8 文本」免费吗？需要注册吗？Is the Generate Random UTF-8 free? Do I need an account?
「随机 UTF-8 文本」完全免费，无需注册或安装，打开网页即可使用，手机和电脑都能用；输入的内容只在你的浏览器本地处理。The Generate Random UTF-8 is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.