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Technical/Unicode

Giá trị số duy nhất được gán cho mỗi ký tự trong tiêu chuẩn Unicode, được viết theo định dạng U+XXXX (ví dụ: U+1F600 cho 😀).

Every character in Unicode — whether a letter, symbol, or emoji — is identified by a code point. Code points range from U+0000 to U+10FFFF, providing space for over 1.1 million possible characters.

Emoji code points are mostly in the range U+1F000 to U+1FAFF. A single emoji you see on screen may actually involve multiple code points combined through mechanisms like Zero Width Joiner (ZWJ) sequences or variation selectors.

For example, the family emoji 👨‍👩‍👧‍👦 is actually seven code points joined together: U+1F468 U+200D U+1F469 U+200D U+1F467 U+200D U+1F466.

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Unicode Lookup: Find Any Emoji by Code Point

Enter a Unicode code point like U+1F600 or paste an emoji to see its full encoding breakdown — UTF-8, UTF-16, HTML entities, and more.

What Are ZWJ Sequences? How Emoji Combine

Learn how Zero Width Joiner (ZWJ) sequences combine multiple emoji into one — from family emoji to professions to flags.

Unicode Normalization Forms: NFC, NFD, NFKC, NFKD Explained

Understand Unicode normalization forms NFC, NFD, NFKC, and NFKD — what they do, why they matter for emoji, and when to use each one.

Unicode Emoji Properties: Extended_Pictographic, Emoji_Presentation, and More

A developer's guide to Unicode emoji properties: what Extended_Pictographic, Emoji_Presentation, Emoji_Modifier, and Emoji_Component mean in practice.

Text vs Emoji Presentation Selectors: VS15 (U+FE0E) and VS16 (U+FE0F)

How Unicode variation selectors VS15 and VS16 control text vs emoji presentation — with code examples for detection and normalization.

Skin Tone Modifiers: How Emoji Diversity Works

How emoji skin tone modifiers work — the Fitzpatrick scale, encoding details, and the impact on digital representation.