Custom Emoji

Custom Emoji is a feature that allows you to use images uploaded to the instance as emoji. They can be used in places such as notes, reactions, chat, self-introductions, and names. To use a custom emoji in those places, press the emoji picker button (if present) or type : to display emoji suggestions. If a string of the form :foo: is found in the text, the foo part is interpreted as a custom emoji name and replaced by the corresponding custom emoji when displayed.

To see which custom emoji are available on the server, go to "Custom Emoji" in the Server Info section of Misskey Web.