补充多文种平面（SMP）

SMP

Encoding & Standards

Unicode第1平面（U+10000至U+1FFFF），绝大多数表情符号码位都分配在此区域。

The SMP is Unicode's Plane 1, containing characters that didn't fit in the original Basic Multilingual Plane. It includes emoji (U+1F000 to U+1FAFF), ancient scripts, musical notation, mathematical alphanumeric symbols, and more.

The emoji blocks in the SMP include:
- U+1F300-U+1F5FF: Miscellaneous Symbols and Pictographs
- U+1F600-U+1F64F: Emoticons
- U+1F680-U+1F6FF: Transport and Map Symbols
- U+1F900-U+1F9FF: Supplemental Symbols and Pictographs
- U+1FA00-U+1FA6F: Chess Symbols
- U+1FA70-U+1FAFF: Symbols and Pictographs Extended-A

Because SMP characters are above U+FFFF, they require 4 bytes in UTF-8 and surrogate pairs in UTF-16.

相关术语

UTF-16 UTF-16
每字符使用2或4个字节的可变长度Unicode编码方式，被JavaScript、Java和Windows内部使用。 代理对 代理对
用于表示U+FFFF以上字符的两个UTF-16编码单元组合，由高代理（U+D800-U+DBFF）和低代理（U+DC00-U+DFFF）构成。 平面 平面
由65,536个连续Unicode码位构成的分组。第0平面为基本多文种平面（BMP），大多数表情符号位于第1平面（SMP）。

相关工具

🔢 Unicode 查询 Unicode 查询
输入 U+1F600 等码位，获取表情符号、编码详情、UTF-8/16 字节和 HTML 实体。

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Emoji Encoding Guide: UTF-8, UTF-16 & Surrogate Pairs
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