A Complete Guide to Unicode and Text Emoticons

Kaomoji, special characters, and Instagram fonts all work thanks to a shared standard called Unicode. Here’s how it works, explained simply.

What is Unicode?

Unicode is an international standard that gives every letter and symbol in the world its own unique number. The Korean ‘가’, the letter ‘A’, a star ‘★’, a smiley ‘😊’ — each has an assigned number. That’s why any device or app interprets the same number as the same character, so what you send looks the same to the person receiving it.

Kaomoji vs. Emoji

An emoji (😊, ❤️) is a single “picture character.” A kaomoji ((｡•ᴗ•｡)) is built from brackets, symbols, and letters to form a face. Because a kaomoji is a combination of characters rather than an image, it still displays where emoji aren’t supported, and it allows more delicate expression.

Where do special characters come from?

Stars (★), hearts (♥), arrows (→), and brackets (꒰꒱) are all official Unicode characters too. They simply aren’t on your keyboard — but they’re real characters with numbers, so you can copy and paste them anywhere. MojiBox’s Symbols collection organizes them by type.

Why do they look the same everywhere?

Because kaomoji and symbols are characters, not images. With an image you’d need to upload it and it might look different per app, but a character only needs its Unicode number — the receiving device draws it in the same shape. That’s why it looks identical on KakaoTalk, Instagram, Discord, or in a game.

Why does it sometimes show as a box (□)?

If a character appears as a box or question mark, the device simply doesn’t have a “drawing” (font glyph) for it. The number arrived, but there’s no shape to render. Newer devices support a wider range. When something looks broken, switching to a more widely-used symbol or style usually fixes it.

How Instagram fonts work

“Bold” or “rounded” fonts aren’t really separate fonts — they’re differently-shaped letters that already exist inside Unicode (such as bold alphabets made for math notation). Copy and paste them and they look like a font. Note that there are almost no Korean variants, so they work best with letters and numbers.

Using it on MojiBox

Now that you know the basics, try it out. For emotion, use Emoticons; to decorate a profile, use Symbols and Nickname; for an English nickname, try Fonts. Need your own face? Build one with the Maker.