What ⌃ means
⌃ is the up arrowhead. Unicode classifies it as an “other symbol” — Unicode's shelf for signs that are neither maths, money nor punctuation and files it in the Miscellaneous Technical 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+2303. In HTML that is ⌃, and in CSS \2303.
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 2303, 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 “up arrowhead”.
Linux
Ctrl+Shift+UType 2303, then Enter or Space.
HTML
⌃CSS
\2303Codes and encoding1 code points
HTML decimal
⌃
HTML hex
⌃
CSS content
content: "\2303";
Each escape is closed by the next backslash; a trailing space is needed before a literal hex digit.
URL encoded
%E2%8C%83
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.