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🔗 Unicode URL 编码URL Encode Unicode
对文本做 encodeURIComponent（UTF-8 百分号编码）。本地处理。Percent-encode the text as UTF-8 with encodeURIComponent. Processed locally.
使用说明与常见问题How-to & FAQ
「Unicode URL 编码」是什么？What is the URL Encode Unicode tool?
对文本做 encodeURIComponent（UTF-8 百分号编码）。本地处理。Percent-encode the text as UTF-8 with encodeURIComponent. Processed locally.
如何使用「Unicode URL 编码」？How do I use the URL Encode Unicode tool?
在「Unicode URL 编码」中，把内容粘贴或输入到上方输入框，结果会实时显示在下方，点击「复制结果」即可复制。例如输入「a b」，得到「a%20b」。In the URL Encode Unicode: Paste or type into the input box; the result appears below instantly — click "Copy result" to copy it. Example: "a b" → "a%20b".
哪些字符不编码？Which characters are left as they are?
和 JavaScript 的 encodeURIComponent 一样：A–Z a–z 0–9 和 - _ . ! ~ * ' ( ) 不编码，其余（包括 / ? & = 和空格）都编码，空格变成 %20（不是 +）。这和 Python 的 urllib.parse.quote 默认不同：quote 保留 /，但会编码 ! ' ( ) *。The same as JavaScript's encodeURIComponent: A–Z a–z 0–9 and - _ . ! ~ * ' ( ) are kept, and everything else, including / ? & = and spaces, is encoded, with a space becoming %20 rather than +. This differs from Python's urllib.parse.quote default, which keeps / but encodes ! ' ( ) *.
为什么提示孤立的代理码位？Why do I see a lone surrogate error?
文本里有半个 Emoji（UTF-16 代理对只剩一半），它不是有效字符，无法编码成 UTF-8。错误会指出是第几个字符，删掉它或补全那个 Emoji 即可。The text contains half of an emoji, one side of a UTF-16 surrogate pair, which is not a valid character and cannot be encoded as UTF-8. The error says which character it is; delete it or complete the emoji.
输入和输出是什么样的？What does the input and output look like?
例如在「Unicode URL 编码」中输入 a b，输出为：a%20b。For example, the URL Encode Unicode turns the input a b into: a%20b.
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。「Unicode URL 编码」的处理全部在本地完成。No. Encoding (Base64, URL…) is reversible by anyone; encryption needs a key. The URL Encode Unicode works fully offline in your browser.
「Unicode URL 编码」免费吗？需要注册吗？Is the URL Encode Unicode free? Do I need an account?
「Unicode URL 编码」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 URL Encode Unicode is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.