Glossary
Key terms about emoji and Unicode, explained clearly.
Codepoint - the address of every character in Unicode
A codepoint is the unique hexadecimal number assigned to each character in Unicode. Learn how codepoints work, how to read them, and why emoji codepoints matter for developers.
Last updated: 2026-05-19ZWJ (Zero Width Joiner) - what it is and how it works
Zero Width Joiner (ZWJ) is an invisible Unicode character that combines multiple emoji into a single glyph. Learn how it works, where it's used, and why sequences sometimes break.
Last updated: 2026-05-26