How do you use a Slack emoji generator?
There is no official Slack emoji generator. Instead, use an online emoji generator—like QuillBot’s free emoji generator—to create a custom emoji and then add it to Slack.
After creating your emoji, download the image file. In Slack, click the smiley face icon and then “Add Emoji.” Upload your image file, give it a name in Slack, and click “Save.”
To use it in Slack messages, select it from the emoji panel or type :emoji-name: to find it immediately.