🔀 随机大小写 UTF-8Randomize UTF-8 Case
按字素随机切换字母大小写（可设种子），只改大小写、不改长度；没有一对一大小写的字符（如 ß、İ、fi、Dž、希腊字母 Σ/σ/ς）保持原样。本地处理。Randomly flip letter case per grapheme (optional seed). Only the case changes and the length stays the same; characters without a one-to-one case pair (such as ß, İ, fi, Dž and the Greek Σ/σ/ς) are left as they are. Processed locally.
使用说明与常见问题How-to & FAQ
「随机大小写 UTF-8」是什么？What is the Randomize UTF-8 Case tool?
按字素随机切换字母大小写（可设种子），只改大小写、不改长度；没有一对一大小写的字符（如 ß、İ、fi、Dž、希腊字母 Σ/σ/ς）保持原样。本地处理。Randomly flip letter case per grapheme (optional seed). Only the case changes and the length stays the same; characters without a one-to-one case pair (such as ß, İ, fi, Dž and the Greek Σ/σ/ς) are left as they are. Processed locally.
如何使用「随机大小写 UTF-8」？How do I use the Randomize UTF-8 Case tool?
在「随机大小写 UTF-8」中，把内容粘贴或输入到上方输入框，按需设置「种子」，结果会实时显示在下方，点击「复制结果」即可复制。例如输入「123」，得到「123」。In the Randomize UTF-8 Case: Paste or type into the input box, adjust "Seed"; the result appears below instantly — click "Copy result" to copy it. Example: "123" → "123".
哪些字符会变、哪些不变？Which characters change and which stay?
只有存在一对一大小写对应的字母会被随机切换，数字、符号、汉字和表情不变。ß、İ、ı、fi、ʼn、Dž 这类转换后会变成多个字符或无法还原的字母保持原样；希腊字母 Σ/σ/ς 也不动，以免弄错词尾的 ς。所以输出和输入长度相同，转成小写后也和原文转小写一致。Only letters with a one-to-one upper/lower pair are flipped at random; digits, symbols, CJK and emoji stay as they are. Letters whose case change would produce several characters or could not be reversed, such as ß, İ, ı, fi, ʼn and Dž, are left alone, and so are the Greek Σ/σ/ς so that a word-final ς is never broken. The output therefore has the same length as the input and lowercases to the same text.
种子有什么用？What does the seed do?
同一个种子和同样的文本总是得到同样的结果；清空种子则每次都随机。The same seed and text always give the same result; clear the seed for a different result each time.
输入和输出是什么样的？What does the input and output look like?
例如在「随机大小写 UTF-8」中输入 AAAA，「种子」设为 1，输出为：aAaa。For example, the Randomize UTF-8 Case turns the input AAAA, "Seed" set to 1 into: aAaa.
有哪些选项可以调整？What options can I adjust?
「随机大小写 UTF-8」的设置：「种子」默认 1。每次生成结果都按当前设置处理。Settings in the Randomize UTF-8 Case — "Seed" default 1. The result always uses the current settings.
处理大段文本会卡吗？Can it handle long text?
「随机大小写 UTF-8」在浏览器中直接处理，几 MB 以内的文本通常瞬间完成；文本不会离开你的设备。The Randomize UTF-8 Case runs in your browser; text up to a few MB is usually processed instantly and never leaves your device.
「随机大小写 UTF-8」免费吗？需要注册吗？Is the Randomize UTF-8 Case free? Do I need an account?
「随机大小写 UTF-8」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 Randomize UTF-8 Case is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.