What means
Compatibility normalization can turn it into plain 1.
This character has a font-style mapping to the ordinary digit 1. Unicode’s NFKC and NFKD modes fold such presentation variants into plain text; NFC and NFD preserve the outlined form.
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 1CCF1, 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 “outlined digit one”.
Linux
Ctrl+Shift+UType 1ccf1, then Enter or Space.
HTML
𜳱CSS
\1CCF1Type 1CCF1 in GNOME/GTK
As of 2026, in a GNOME/GTK text field, press Ctrl+Shift+U, type 1CCF1, then Space or Enter. Typing 1 alone enters the plain digit.
Codes and encoding1 code points
HTML decimal
𜳱
HTML hex
𜳱
CSS content
content: "\1CCF1";
Each escape is closed by the next backslash; a trailing space is needed before a literal hex digit.
URL encoded
%F0%9C%B3%B1
1
On screen
1
Code points
2
JS .length
4
UTF-8 bytes
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.