What is Combining Enclosing Keycap?

Combining Enclosing Keycap is a combining character in Unicode, with code point U+20E3. It encloses the preceding base character in a box, making it visually appear as a keyboard key.

Basic Information

Property	Value
Unicode code point	`U+20E3`
Official name	COMBINING ENCLOSING KEYCAP
Chinese name	Combining Enclosing Keycap
Unicode version	3.0 (1999)
Emoji version	None (participates in Emoji sequences as a combining component)
Standalone copy result	⃣ (appears as a black-and-white square in some fonts)

How It Combines

The basic combination formula is:

Base character + U+20E3 = Keycap symbol

Examples:

1 + U+20E3 = 1⃣
1 + U+FE0F + U+20E3 = 1️⃣ (adding Variation Selector to ensure emoji style)

Use in Emoji

Not all characters can combine with the Combining Enclosing Keycap. In the Emoji standard, only the following 12 characters are allowed to form valid emoji keycap sequences: digits 0–9, symbols * and #.

Emoji	Combining sequence
0️⃣	`0` + `U+FE0F` + `U+20E3`
1️⃣	`1` + `U+FE0F` + `U+20E3`
2️⃣	`2` + `U+FE0F` + `U+20E3`
3️⃣	`3` + `U+FE0F` + `U+20E3`
4️⃣	`4` + `U+FE0F` + `U+20E3`
5️⃣	`5` + `U+FE0F` + `U+20E3`
6️⃣	`6` + `U+FE0F` + `U+20E3`
7️⃣	`7` + `U+FE0F` + `U+20E3`
8️⃣	`8` + `U+FE0F` + `U+20E3`
9️⃣	`9` + `U+FE0F` + `U+20E3`
*️⃣	`*` + `U+FE0F` + `U+20E3`
#️⃣	`#` + `U+FE0F` + `U+20E3`

Note: 🔟 (keycap 10) is not formed by combining 10 but is a separate Unicode character with code point U+1F51F.