What ⧈ means
⧈ is the squared square. Unicode classifies it as a mathematical symbol and files it in the Miscellaneous Mathematical Symbols-B block; this site shelves it under Maths.
Its appearance depends on the font and text styling.
How it is encoded
⧈ is a single code point, U+29C8. In HTML that is ⧈, and in CSS \29C8.
Don't confuse it with
4Questions people ask
1Why does ⧈ 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 ⧈
Windows (Word)
Alt+XType 29C8, then Alt+X to get ⧈.
Windows
Win+Rrun charmap for the full table, or use the emoji picker's Ω symbols tab (Win + .).
macOS
Control+Command+SpaceOpen the character viewer and search “squared square”.
Linux
Ctrl+Shift+UType 29c8, then Enter or Space.
HTML
⧈CSS
\29C8Codes and encoding1 code points
HTML decimal
⧈
HTML hex
⧈
CSS content
content: "\29C8";
Each escape is closed by the next backslash; a trailing space is needed before a literal hex digit.
URL encoded
%E2%A7%88
1
On screen
1
Code points
1
JS .length
3
UTF-8 bytes
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.