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🔤 码位转 UTF-8 字节Convert Code Points to UTF-8
把码位（U+4E2D、0x4E2D、\u4E2D、\U0001F600 或纯十六进制数字）转换成 UTF-8 十六进制字节（如 E4 B8 AD），可选同时显示文本。本地处理。Convert code points (U+4E2D, 0x4E2D, \u4E2D, \U0001F600 or bare hex numbers) into UTF-8 hex bytes such as E4 B8 AD, optionally showing the text as well. Processed locally.
使用说明与常见问题How-to & FAQ
「码位转 UTF-8 字节」是什么？What is the Convert Code Points to UTF-8 tool?
把码位（U+4E2D、0x4E2D、\u4E2D、\U0001F600 或纯十六进制数字）转换成 UTF-8 十六进制字节（如 E4 B8 AD），可选同时显示文本。本地处理。Convert code points (U+4E2D, 0x4E2D, \u4E2D, \U0001F600 or bare hex numbers) into UTF-8 hex bytes such as E4 B8 AD, optionally showing the text as well. Processed locally.
如何使用「码位转 UTF-8 字节」？How do I use the Convert Code Points to UTF-8 tool?
在「码位转 UTF-8 字节」中，把内容粘贴或输入到上方输入框，按需设置「字节分隔」、「大小写」，结果会实时显示在下方，点击「复制结果」即可复制。例如输入「U+4E2D」，得到「E4 B8 AD」。In the Convert Code Points to UTF-8: Paste or type into the input box, adjust "Byte separator", "Case"; the result appears below instantly — click "Copy result" to copy it. Example: "U+4E2D" → "E4 B8 AD".
可以输入哪些格式？Which formats can I enter?
U+4E2D、0x4E2D、\u4E2D、\u{1F600}、\U0001F600，以及纯数字 4E2D，都按十六进制读取（纯数字也是十六进制，所以 41 是 U+0041，即字母 A）。多个码位用空格、逗号或分号分隔，带前缀的也可以连写，如 U+4E2DU+1F600。无法识别的一项会在错误里原样引用。U+4E2D, 0x4E2D, \u4E2D, \u{1F600}, \U0001F600 and the bare number 4E2D are all read as hex; bare numbers are hex too, so 41 means U+0041, the letter A. Separate code points with spaces, commas or semicolons, or run prefixed ones together as in U+4E2DU+1F600. An entry that cannot be read is quoted in the error.
输出是什么？What is the output?
每个码位的 UTF-8 编码字节，用十六进制表示，例如 U+4E2D（中）是 E4 B8 AD，U+1F600（😀）是 F0 9F 98 80。可以选字节分隔方式和大小写，勾选“同时显示文本”会在下一行显示对应的字符。The UTF-8 bytes of each code point in hex: U+4E2D is E4 B8 AD and U+1F600 (😀) is F0 9F 98 80. You can choose the byte separator and the case, and Also show the text adds the characters on a second line.
哪些码位会被拒绝？Which code points are rejected?
超过 U+10FFFF 的值，以及 U+D800–DFFF 的代理码位（它们不是字符，不能单独编码成 UTF-8）。如果输入的是一对代理码位（如 U+D83D U+DE00），错误会告诉你应写成的码位 U+1F600。Values above U+10FFFF and the surrogates U+D800–DFFF, which are not characters and cannot be encoded as UTF-8 on their own. If you enter a surrogate pair such as U+D83D U+DE00, the error tells you the code point to use instead, U+1F600.
输入和输出是什么样的？What does the input and output look like?
例如在「码位转 UTF-8 字节」中输入 U+4E2D，输出为：E4 B8 AD。For example, the Convert Code Points to UTF-8 turns the input U+4E2D into: E4 B8 AD.
有哪些选项可以调整？What options can I adjust?
「码位转 UTF-8 字节」的设置：「字节分隔」可选 空格、无、逗号、\x 前缀（默认 空格）；「大小写」可选 大写、小写（默认 大写）；可勾选：「同时显示文本」。每次生成结果都按当前设置处理。Settings in the Convert Code Points to UTF-8 — "Byte separator": Space, None, Comma, \x prefix (default Space); "Case": Upper case, Lower case (default Upper case); tick boxes: "Also show the text". 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。「码位转 UTF-8 字节」的处理全部在本地完成。No. Encoding (Base64, URL…) is reversible by anyone; encryption needs a key. The Convert Code Points to UTF-8 works fully offline in your browser.
「码位转 UTF-8 字节」免费吗？需要注册吗？Is the Convert Code Points to UTF-8 free? Do I need an account?
「码位转 UTF-8 字节」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 Convert Code Points to 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.