The Upwards Button emoji is a triangle pointing up. You will most likely see this symbol on a computer. It is meant to raise the volume on your computer.
The upwards button emoji was introduced in 2010 and released as part of the Unicode 11.0 standard. This emoji can be found under the symbols category. Because the upwards button emoji has been around for quite some time, it should display correctly in the majority of operating systems.

Here you'll find a range of emojis on how they will look using different operating systems. Each company will design an emoji according to their own style. Here we have listed the most popular platforms around to see how the emoji will look on their screens.

Short Codes:

:arrow_up_small:

Hex Code:

🔼

Decimal Code:

🔼

Punycode:

xn--sw8h

URL Escape Code:

%F0%9F%94%BC

JavaScript & JSON:

\ud83d\udd3c

CSS Code:

content: '\01F53C';