What 쭌 means
Alone, 쭌 is a syllable; in names, it can be a nickname. The block combines ㅉ, a Korean consonant pronounced more tightly than plain ㅈ, with the vowel ㅜ and final consonant ㄴ. So 준 and 쭌 are different syllables, not alternate font styles. Writing 준 as 쭌 can make a name feel more playful or affectionate.
Hangul was created in 1443 to make Korean easier to write and learn. The 1446 book Hunminjeongeum explained the writing system’s purpose and principles. 쭌 follows that regular syllable-block structure; the nickname spelling is an informal use of it.
As a nickname spelling, 쭌 feels informal and affectionate; use 준 for the person’s standard name spelling.
Changing someone’s 준 to 쭌 can feel overly familiar.
What it means when someone sends it to you
3 readingsDon't confuse it with
1Combination ideas
2Questions people ask
1Why does 쭌 show as a box on some devices?
Because that device's fonts have no glyph for it. The character is still correct and still copies correctly — the box is a missing glyph, not a broken character.
How to type 쭌
쭌\CB4CCodes and encoding1 code points
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.