What ☻ means
☻ is the black smiling face. 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 Symbols block; this site shelves it under Stars & signs.
Its appearance depends on the font and text styling.
How it is encoded
☻ is a single code point, U+263B. In HTML that is ☻, and in CSS \263B.
Don't confuse it with
4Questions people ask
1Why does ☻ look like a square?
The font or app lacks display support for ☻. It may show a blank or a generic replacement mark; the character itself has not changed.
How to type ☻
☻\263BCodes and encoding1 code points
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.

